Olga Petko

<i>Vella fallax</i> (Rambur, 1842) (Fig. 6) <i>Myrmeleon fallax</i> Rambur 1842: 385. <b>Type,</b> "La Guyane " (not located). <b>Specimens examined.</b> <b>San Pedro</b> (9): Reserva Natural Laguna Blanca (S23 o 48'43.0 '' W056 o 17'40.8 ''), CZPLT 500 (7 XI 2010, Col. K. Atkinson); CZPLT 969 (VIII or IX 2012, Col. K. Atkinson); CZPLT 969 (VIII or IX 2012, Col. K. Atkinson); CZPLT 2761 (17 XI 2014, Col. O. Petko); CZPLT 2762 (14 XI 2014, Col. O. Petko); CZPLT 2871 (21 XI 2014, Col. O. Petko); CZPLT 2762 (14 XI 2014, Col. O. Petko); CZPLT 3167 (7 II 2015, Col. O. Petko); CZPLT 3168 (7 II 2015, Col. O. Petko). All specimens were collected at house lights or a light trap in a transitional area between Cerrado, Cerrado gallery forest and Atlantic Forest at the Reserva Natural Laguna Blanca. Prior to the collection of these specimens an individual of this species was photographed during the day on 17 February 2010 at the same locality by P. Smith (www.faunaparaguay.com/myrmeleontidae.html, FPMYR009 PH).

<i>Dimares elegans</i> form " <i>lepida"</i> Navás, 1912 (Fig. 1) <i>Dimares elegans lepida</i> Navás 1912: 41. Fig. 3. <b>Syntypes</b>, Catamarca and Mendoza, Argentina (Copenhagen). <b>Specimens examined. Boquerón</b> (1): Cruce Loma Plata (estimated S22 o 34'38.1 '' W059 o 50'11.1 '') (MNHNP 9 I 1993, Col. C. Aguilar). No ecological data accompanies this specimen, but the habitat in this area is Dry Chaco scrub. <b>Presidente Hayes</b> (3): Laguna Capitán (S22 o 33' W059 o 42' '), CZPLT 3382- 3384 (23-24 III 2015, Col. P. Smith). All Laguna Capitán specimens were collected at house lights in an area of Dry Chaco scrub surrounded by salt lagoons.

The development stability has been assessed (by the magnitude of the fluctuating asymmetry of craniological traits) with the change in the number of the Korean field mouse Apodemus peninsulae in Mongolia. It has been shown that an increase in the abundance of this species is not accompanied by a violation of developmental stability, but occurs against the background of a high abundance of other species (the gray red-backed vole Clethrionomys rufocanus and the reed vole Microtus fortis). The result obtained testifies to the assumption that not only the population size of the studied species itself, but also the increase in the number of other species of the community can play a role in manifestation of the overcrowding effect, which can lead to a change in the state of individuals recorded in this case by reduce the developmental stability.

Five species of Castniidae are reported from Reserva Natural Laguna Blanca, Departamento San Pedro, Paraguay at the interface of the Cerrado and Atlantic Forest zones. These include a new country record Eupalamides geron (Kollar, 1839), a species formerly considered endemic to Brazil. The locality is thus one of the most biodiverse for the family in Paraguay and may be considered of vital importance for its conservation.