Encarsia barracas Myartseva

Myartseva, Svetlana Nikolaevna, Ruíz-Cancino, Enrique & Blanco, Juana María Coronado-, 2013, Four new species of Aphelinidae (Hymenoptera: Chalcidoidea) from Mexico, Zootaxa 3641 (3), pp. 223-232 : 226-228

Encarsia barracas Myartseva , sp. n.

( Figs 5–8 )

Material. Holotype female: Mexico, Baja California Sur, (Los Cabos), Las Barracas , in pan trap, 14. V. 1984 (col. P. DeBach), UCRC Ent. N 54486.

Length of body (without ovipositor) = 0.7 mm.

Coloration. Head yellow, face below lighter, antennae light yellow. Mesosoma yellow. Fore wing hyaline. Legs light yellow. Gaster yellow. Ovipositor sheath infuscate.

Structure. Head slightly wider than mesosoma, 1.3× wider than high; frontovertex transversely striate, about 0.5× as wide as head. Ocelli in obtuse triangle; distance between posterior ocelli about 1.6× as long as distance from ocellus to eye margin. Eye about as long as cheek. Mandible with 3 large teeth. Distance between toruli about 0.8× as long as distance from torulus to eye margin. Antennae ( Fig. 5 ) inserted below level of lower margin of eyes; radicle 2.4× as long as wide; scape about 4× as long as wide; pedicel 1.3× as long as wide; funicle with first segment slightly shorter than pedicel, about 1.6× as long as wide, second and third segments subequal in length, 1.6× as long as wide, with second segment slightly longer than first segment and slightly shorter than third segment, but both second and third segments1.5× as long as wide; club 3-segmented, slightly wider and shorter than funicle; flagellum with segments 3–6 each with one longitudinal sensilla. Mesoscutum with 4 pairs of setae on mid lobe, placed symmetrically, and 3 setae on each side lobe. Axilla with 1 seta. Scutellum about 0.7× as long as mid lobe of mesoscutum and about 0.9× as wide as long; placoid sensilla widely spaced; anterior pair of setae about 0.6× as long as posterior pair of setae; distance between bases of anterior setae about 1.3× as long as distance between bases of posterior setae. Fore wing uniformly setose with short setae; about 2.8× as long as maximum width of wing; marginal fringe about 0.2× as long as width of wing; base with 4 setae; marginal vein ( Fig. 6 ) with 7 setae along anterior margin. Hind wing 5× as long as maximum width of wing; marginal fringe slightly longer than width of wing. Tarsal formula 5-5-5. Middle leg with tibial spur about as long as basitarsus ( Fig. 7 ); basitarsus as long as following two tarsal segments combined. Hind leg with basitarsus about as long as following three tarsal segments combined. Ovipositor ( Fig. 8 ) exerted, about 1.4× as long as mid tibia; third valvula about 0.3× as long as second valvifer.

Male unknown.

Comments. Encarsia barracas sp. n. is similar to E. pitilla Myartseva & Evans and to E. albata sp. n. It can be distinguished from E. pitilla by following complex of characters: head and body yellow versus with some infuscated parts; club shorter than versus longer than funicle; fore wing with marginal fringe 0.2× versus 0.4× as long as maximum width of wing; marginal vein with 7 versus 8–10 setae along anterior margin; base of wing with 4 versus 9–12 setae; marginal fringe of hind wing slightly longer versus 1.8× longer than width of wing; and ovipositor 1.4× versus 1.1× as long as mid tibia. Differences between E. barracas sp. n. and E. albata sp. n. are given in the key (see above).

Etymology. The species is named after the type locality, Las Barracas .

Figures

FIGURES 5 – 8. Encarsia barracas, sp. n., female: 5, antenna; 6, marginal vein; 7, mid tarsus; 8, ovipositor.