Diptera, Ceratopogonidae Newman, 1834: New records of Biting and Predaceous midges from Iberá wetlands, Argentina

The first Argentina records of four species of biting and predaceous midges (Diptera: Ceratopogonidae) are provided from the Iberá wetlands in Corrientes Province: Forcipomyia (Euprojoannisia) unica Bystrak and Wirth, Echinohelea blantoni Wirth, Neobezzia fittkaui Wirth and Ratanaworabhan and Paryphoconus grandis Macfie. This is the first record of the predaceous midge genus, Echinohelea Macfie, from Argentina.Fil: Spinelli, Gustavo Ricardo. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Entomología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Limnología "Dr. Raúl A. Ringuelet". Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Instituto de Limnología; ArgentinaFil: Marino, Pablo Ignacio. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Entomología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Mauad, Melina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Limnología "Dr. Raúl A. Ringuelet". Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Instituto de Limnología; Argentin

Nuevos registros de Ceratopogonidae (Diptera) para Argentina y Chile

New records are provided for 22 species of biting midges (Diptera: Ceratopogonidae) from Argentina and Chile, 12 belonging to Forcipomyia Meigen, two to Atrichopogon Kieffer and Culicoides Latreille, and one to Leptoconops Skuse, Dasyhelea Kieffer, Paradasyhelea Macfie, Alluaudomyia Kieffer, Macrurohelea Ingram & Macfie and Palpomyia Meigen. Forcipomyia (F.) harpegonata Wirth & Soria, F. (F.) pictoni Macfie, F. (F.) sexvittata Wirth, F. (Lepidohelea) annulatipes Macfie, F. (L.) kuanoskeles Macfie, F. (Phytohelea) jocosa Saunders and F. (Thyridomyia) nana (Macfie) are firstly recorded from Argentina, and Leptoconops ricardoi Ronderos & Spinelli, Atrichopogon endemicus Spinelli & Marino, Culicoides chacoensis Spinelli & Wirth, Paradasyhelea brevipalpis (Ingram & Macfie) and Alluaudomyia schnacki Spinelli are firstly recorded from Chile. Forcipomyia calchaqui Spinelli & Marino is removed from the subgenus Thyridomyia Saunders and assigned to the subgenus Synthyridomyia Saunders.Se brindan nuevas citas de 22 especies de Ceratopogonidae para Argentina y Chile, de las cuales 12 pertenecen a Forcipomyia Meigen, dos a Atrichopogon Kieffer y Culicoides Latreille, y una a Leptoconops Skuse, Dasyhelea Kieffer, Paradasyhelea Macfie, Alluaudomyia Kieffer, Macrurohelea Ingram & Macfie y Palpomyia Meigen. Forcipomyia (F.) harpegonata Wirth & Soria, F. (F.) pictoni Macfie, F. (F.) sexvittata Wirth, F. (Lepidohelea) annulatipes Macfie, F. (L.) kuanoskeles Macfie, F. (Phytohelea) jocosa Saunders y F. (Thyridomyia) nana (Macfie) son registradas por primera vez para Argentina, mientras que Leptoconops ricardoi Ronderos & Spinelli, Atrichopogon endemicus Spinelli & Marino, Culicoides chacoensis Spinelli & Wirth, Paradasyhelea brevipalpis (Ingram & Macfie) y Alluaudomyia schnacki Spinelli lo son para Chile. Se excluye Forcipomyia calchaqui Spinelli & Marino del subgénero Thyridomyia Saunders y se la asigna a Synthyridomyia Saunders.Fil: Spinelli, Gustavo Ricardo. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Entomología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Marino, Pablo Ignacio. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Entomología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Gaddi, Ana Laura. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Entomología; Argentin

Phase transitions and edge scaling of number variance in Gaussian random matrices

We consider $N\times N$ Gaussian random matrices, whose average density of eigenvalues has the Wigner semi-circle form over $[-\sqrt{2},\sqrt{2}]$. For such matrices, using a Coulomb gas technique, we compute the large $N$ behavior of the probability $\mathcal{P}_{\scriptscriptstyle N,L}(N_L)$ that $N_L$ eigenvalues lie within the box $[-L,L]$. This probability scales as $\mathcal{P}_{\scriptscriptstyle N,L}(N_L=\kappa_L N)\approx\exp\left(-{\beta} N^2 \psi_L(\kappa_L)\right)$, where $\beta$ is the Dyson index of the ensemble and $\psi_L(\kappa_L)$ is a $\beta$-independent rate function that we compute exactly. We identify three regimes as $L$ is varied: (i) $\, N^{-1}\ll L<\sqrt{2}$ (bulk), (ii) $\ L\sim\sqrt{2}$ on a scale of $\mathcal{O}(N^{-{2}/{3}})$ (edge) and (iii) $\ L > \sqrt{2}$ (tail). We find a dramatic non-monotonic behavior of the number variance $V_N(L)$ as a function of $L$: after a logarithmic growth $\propto \ln (N L)$ in the bulk (when $L \sim {\cal O}(1/N)$), $V_N(L)$ decreases abruptly as $L$ approaches the edge of the semi-circle before it decays as a stretched exponential for $L > \sqrt{2}$. This "drop-off" of $V_N(L)$ at the edge is described by a scaling function $\tilde V_{\beta}$ which smoothly interpolates between the bulk (i) and the tail (iii). For $\beta = 2$ we compute $\tilde V_2$ explicitly in terms of the Airy kernel. These analytical results, verified by numerical simulations, directly provide for $\beta=2$ the full statistics of particle-number fluctuations at zero temperature of 1d spinless fermions in a harmonic trap.Comment: 5 pag., 3 fig, published versio

Biting Midges of the Forcipomyia (Forcipomyia) argenteola group in southern South America, with description of a new species and a key to the Neotropical species (Diptera: Ceratopogonidae)

A new species of the Forcipomyia (Forcipomyia) argenteola group, F. (F.) donatoi, is described and illustrated from males and females collected in several localities of northern Argentina and in Paraguay. The new species is compared with the similar congeners F. (F.) marini and F. (F.) uramaensis, both from Venezuela. The following three species: Forcipomyia (F.) argenteola, F. (F.) calatheae and F. (F.) quatei are recorded for the first time from Argentina, and a key is presented for the identification of the seven Neotropical species of the group.Fil: Marino, Pablo Ignacio. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Entomología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Spinelli, Gustavo Ricardo. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Entomología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - la Plata. Instituto de Limnología "dr. Raul A. Ringuelet". Universidad Nacional de la Plata. Facultad de Cs.naturales y Museo. Instituto de Limnología; Argentin

The Subgenus Forcipomyia (Metaforcipomyia) In Argentina (Diptera, Ceratopogonidae)

Two new species of the subgenus Forcipomyia (Metaforcipomyia), from Argentina, F. (M. ) williamsi and F. (M.) galliarii,are described and illustrated. In addition, F. (M.) cerifera Saunders, 1956 is redescribed and first recorded for Argentina.Instituto de Limnología "Dr. Raúl A. Ringuelet

Nonperturbative Effects and the Large-Order Behavior of Matrix Models and Topological Strings

This work addresses nonperturbative effects in both matrix models and topological strings, and their relation with the large-order behavior of the 1/N expansion. We study instanton configurations in generic one-cut matrix models, obtaining explicit results for the one-instanton amplitude at both one and two loops. The holographic description of topological strings in terms of matrix models implies that our nonperturbative results also apply to topological strings on toric Calabi-Yau manifolds. This yields very precise predictions for the large-order behavior of the perturbative genus expansion, both in conventional matrix models and in topological string theory. We test these predictions in detail in various examples, including the quartic matrix model, topological strings on the local curve, and Hurwitz theory. In all these cases we provide extensive numerical checks which heavily support our nonperturbative analytical results. Moreover, since all these models have a critical point describing two-dimensional gravity, we also obtain in this way the large-order asymptotics of the relevant solution to the Painleve I equation, including corrections in inverse genus. From a mathematical point of view, our results predict the large-genus asymptotics of simple Hurwitz numbers and of local Gromov-Witten invariants.Comment: 50 pages, 24 figures, JHEP3.cls; v2: added references, added discussion on Painleve I, final version for CNT

Forcipomyia (Synthyridomyia) murina (Winnertz, 1852) in South America. Synonymy and redescription (Diptera: Ceratopogonidae)

Se redescriben ambos sexos de la hasta ahora especie Holártica, Afrotropical y Oriental, Forcipomyia (Synthyridomyia) murina (Winnertz, 1852), y la especie se registra por primera vez en Argentina (provincias de Salta, La Rioja, Santiago del Estero, Córdoba, Corrientes, Buenos Aires y Río Negro). Forcipomyia (S.) calchaqui Spinelli &amp; Marino, 1997 y Forcipomyia (S.) soibelzoni Marino &amp; Spinelli, 2001 se reconocen como sinónimos menores. Se presenta una clave para la identificación de las cuatro especies del subgénero que habitan la región Neotropical, y se compara a F. murina con las especies más similares del Viejo Mundo.Both sexes of the hitherto Holarctic, Afrotropical and Oriental species Forcipomyia (Synthyridomyia) murina (Winnertz, 1852) are redescribed and the species is firstly recorded from Argentina (Salta, La Rioja, Santiago del Estero, Córdoba, Corrientes, Buenos Aires and Río Negro provinces). Forcipomyia (S.) calchaqui Spinelli &amp; Marino, 1997 and Forcipomyia (S.) soibelzoni Marino &amp; Spinelli, 2001 are recognized as its junior synonyms. A key for the identification of the four species of the subgenus that inhabit the Neotropical region is also presented, and F. murina is compared with the most similar Old World species