Dichochrysa Yang, 1991

Kang-zhen, Dong, Wen-zhu, Li, Jun-zhi, Cui & Xing-ke, Yang, 2004, Three New Species Of Dichochrysa (Insecta: Neuroptera: Chrysopidae) From China, With A Checklist Of Chinese Dichochrysa, Raffles Bulletin of Zoology 52 (1), pp. 67-74 : 68-69

Dichochrysa Yang, 1991

Navasius Yang & Yang, 1990a: 327 .

Pseudomallada Tsukaguchi, 1995: 67 .

Dichochrysa Yang, 1991: 150 .

Type species. – Dichochrysa eumorpha (Yang & Yang, 1990a) .

Description. – Medium-sized species, head yellowish green, usually brownish sports on gena and Clypeus;

Mandible broad and left mandible toothed; Antennae slender, longer or as long as the forewings. Pronotum yellowish-green, narrow on the anterior-parts and broad at the posterior-parts like a trapezia. Wing venation similar to that of Mallada , except for basal inner gradate meeting with branches of Rs, and basal outer gradate meeting with Psm. Sternites 8 and 9 fused, without any projection on the apex of sternite 9. Ectoprocts rounded, tignum, entoprocessus and gonapsis present; Median of the gonarcus slender, straight or triangular; Pseudopenis forked. The female genitale are of the common Chrysopa type.

Remarks. – Among Chrysopini of Chrysopinae , Dichochrysa , Mallada and Chrysoperla are similar and sometimes are difficult to discern them. However, they are different in following morphological characters:

1. Apex of abdomen in male ( Figs. 1 a-c):

Dichochrysa : ectoprocts moderate, apex of sternite 8+9 without any projection and invagination ( Fig. 1a ).

Mallada : ectoproct slender, apex of sternite 8+9 with projection ( Fig. 1b ).

Chrysoperla : ectoproct broad, apex of sternite 8+9 with invagination like a lip ( Fig. 1c ).

2. Male genitalia ( Figs. 2 a-c):

Dichochrysa : median of gonarcus slender, entoprocessus large, pseudopenis forked, gonapsis and tignum present ( Fig. 2a).

Mallada : median of gonarcus broad and expanded, entoprocessus very small, pseudopenis (arcessus) not forked, gonapsis and tignum present ( Fig. 2b).

Chrysoperla : median of gonarcus slightly broad, pseudopenis (arcessus) narrow with or without dorsal striations. Tignum present and gonapsis absent ( Fig. 2c).

Distribution. – Palaearctic Region; Oriental Region; African Region.

Figures

Fig. 1. Apex of abdomen in male. a. Dichochrysa; b. Mallada; c. Chrysoperla.