1865.] 21 



white apical margin, and a white line on each side in front of the basal 

 foveae ; remaining segments white, more or less black at the base, ovi- 

 positor black, subexserted. Length 4$ lines; expanse of wings 9 lines. 

 Collection. — Ent. Soc. Philad. One specimen. 



Genus CRYPTUS. Fab. 

 Cryptus cubensis, n. sp. 



Yellowish, shaded with dusky ; sides of mesothorax, base of metathorax, hind 

 legs in part and the three basal segments of abdomen, black ; wings yellowish- 

 hyaline. 



Female. — Dull yellowish, opaque ; antennas rather stout, more than 

 half the length of the body, dusky above, with a broad dull yellowish 

 annulus about the middle. Thorax : sides of mesothorax rather broadly 

 black, the disk with an elongate dusky stain anteriorly; pleura varied 

 with yellowish and black; metathorax with a transverse carina near the 

 base, on each side there is a longitudinal impressed line, and the poste- 

 rior face is somewhat concave, with a slight tubercle on each side; basal 

 half black, the rest yellowish. Wings yellowish-hyaline, the apical 

 margins slightly dusky ; nervures and stigma ferruginous ; areolet 5- 

 angular, or subquadrangular. Legs long and slender, especially the 

 posterior pair, yellow; the posterior coxae black, with a yellow hook-like 

 mark above and a line beneath of the same color, their trochanters 

 black, their femora with a broad black band near the tip, and their tibire 

 and tarsi black at tips. Abdomen elongate, subcompressed, and fusi- 

 form, long, slender at base; the first segment linear and convex, with a 

 slight tubercle on each side a little behind the middle, black, its tip 

 yellow; second and third segments black at base, dusky in the middle 

 and yellow at tip; remaining segments dusky, yellow at tip; ovipositor 

 piceous, exserted about half the length of the abdomen. Length 6 — 

 71 lines; expanse of wings 10 — IB lines. 



Male. — Resembles the female, except that the abdomen is more slen- 

 der and the base of the fourth and fifth segments are narrowly blackish. 

 Length 8 $ lines. 



Collect Ion. — Ent. Soc. Philad. 2 % , 2 9 specimens. 



This species is parasitic upon the larva of Pelopceus hinatus Fab. 



Cryptus fascipennis. Brulle. 



Cryptus fascipennis, Brulle, Hym. p. 191. 

 Collection. — Ent. Soc. Philad. 2 % , 2 9 specimens. 



Cryptus ? ornatipennis. n. sp. 



Dark rufous ; antennae black ; orbits, collar, spots on pleura, spot on scutellum, 

 and another on each side of metathorax, white; abdomen rufous at base and 

 apex, black in the middle; wings hyaline, banded with fuscous. 



Female. — Dark rufous, opaque; orbits white, tips of mandibles black. 



