1922.] 



F. Muir : Indian Derbidae. 



339 



Tbxt-FIG. 4. — Lateral viewol 



male genitalia of Mysidi- 



ides ftiscinervis, 



sp. nov. 



broad, slightly emarginate in middle making it broadly and slight- 

 ly bilobed. Genital styles long, narrow, curved on apical third, 

 a small projection on outer margin 

 near base. 



Female. Lengh 29 mm. ; tegmen 

 6 mm. 



In colour similar to male. Anal 

 segment small, subtriangular, anus at 

 base ; pregenital plate wider than 

 long, posterior margin widely angu- 

 larly produced from sides to middle, 

 the sides of the production slightly 

 excavate; in lateral view straight, 

 hind margin not turned ventrad. 



Described from a male and female 

 (types), from Talewadi, near Castle Rock, North Kanara District, 

 Bombay Pres., October, 1916 (S. Kemp); and two males and two 

 females from Castle Rock, October, 1916 (S. Kemp). 



Mysidiides furcata, sp. nov. 

 (Fig. 5-) 



Male. Length r8 mm. ; tegmen 5 mm. 



Dark brown; lighter over middle of mesonotum, legs, lateral 

 portions of pronotum and genital styles. Tegmina hyaline, 

 slightly opaque with waxy secretion, veins yellow except Cu 1, 

 fork of Cu and first (basal) median section, radial cross veins 

 and base of second median sector and apical cross-veins which are 

 fuscous, the fuscous spreading out into the membrane, fuscous 

 at apex of subcostal cell and over apical cells. 



Lateral margins of pygofer rounded, not angularly produced. 



Anal segment large, in lateral 

 view curved ventrad, anus 

 about middle, in dorsal view 

 gradually narrowing to near 

 apex where it is produced into 

 a furcate apex. Genital styles 

 large, apical half curved dor- 

 sad, apex rounded, outer mar- 

 gin with two processes near 

 base, the basal one subquad- 

 rate and broader than long, 

 the distal one small and thin, 

 inner margin with a subquad- 

 rate projection about middle. 

 Female. Length 27 mm. ; tegmen 6 mm. 

 In colouration similar to male. In lateral view the pregenital 

 plate concave, the posterior margin slightly and angularly pro- 

 duced in middle and turned ventrad, a minute emargination in the 

 middle. 



Text-fig. 5. — Lateral view of male 



genitalia of Mysidiides furcata, 



«p. nov. a. Apex of anal 



segment. 



