Cheiloneurus javanus Perkins, 1912

Guerrieri, Emilio, 2006, Review of the encyrtid (Hymenoptera, Chalcidoidea, Encyrtidae) parasitoids of Dryinidae (Hymenoptera, Chrysidoidea, Dryinidae): second contribution and description of a new species of Cheiloneurus, Journal of Natural History 40 (41 - 43), pp. 2395-2401 : 2399-2400

Cheiloneurus javanus Perkins

( Figure 2 )

Cheiloneurus javanus Perkins, 1912:17 . Lectotype ♀, USA (BBMH), here designated, examined.

Redescription

Female. Lectotype: length 1 mm. Head yellow, frontovertex brown with faint metallic lustre; antenna ( Figure 2 (5)) with scape and pedicel light brown, funicle white and clava black; mesoscutum brown with metallic reflections, axillae, scutellum (except brown apex), tegulae, metanotum and propodeum yellow; fore wing strongly infuscate save speculum and a band running from postmarginal vein to posterior margin of wing; legs yellow, apex of tarsi brown; gaster brown, paler in the middle. Head 5× as broad as frontovertex; ocelli forming a strongly acute angle of about 30 °; antenna ( Figure 2 (5)) with scape 6× as long as broad; F1 subquadrate and 0.5× as long as pedicel; clava obliquely truncate at apex (truncation 0.5× as long as clava length); linear sensilla on F4–F6 and on clava. Relative measurements: HW 35, FV 7, OOL 1, OCL 4.5, POL 3, SL 24, SW 4.

Fore wing about 3× as long as broad, venation as in Figure 2 (6). Relative measurements: FWL 91, FWW 30, SMV 35, MV 19, PMV 5, SV 7. Gaster with ovipositor slightly exserted, a little longer than mid tibia. Relative measurements: MT 102, OL 90, GL 26.

Material examined

Lectotype: ♀, Java, Pekalogan F. M., 1907, here designated ( BBMH) . Paralectotypes: 4♀ same data as lectotype .

Comments

I have examined a card-mounted specimen from BBMH that bears the number ‘‘352’’ handwritten on it, a label handwritten by Perkins with the name: ‘‘ Cheiloneurus javanus type’’ and a typewritten label with the following indications: ‘‘Java Pekalogan F. M. 1907’’. On the card, five encyrtids (arranged in two rows) and the remnants of what seems to be an adult of Membracidae are mounted. As the card data and those reported in the original description are coherent, in the interest of nomenclatural stability, I designate the first specimen top left as the LECTOTYPE of C. javanus . The female of C. javanus is extremely similar to that of C. gonatopodis with which it shares the pattern of hyaline and infuscate areas on the fore wing (see Figure 14 in Guerrieri and Viggiani 2005). Females of the two species can be separated by the distribution of linear sensilla on the funicle and by the structure of the clava. In C. javanus , linear sensilla are present on F4–F6 and the clava is obliquely truncate at the apex (for nearly half of its length) and nearly as long as the funicle. In C. gonatopodis , linear sensilla are present only on F5 and F6 and the clava is transversely truncate at apex and it is clearly shorter than the funicle.

Figures

Figure 2. Cheiloneurus javanus ♀: (5) antenna and (6) fore wing venation.