1865.] 19 



nervures fuscous, stigma fulvous; areolet subtriangular, slightly oblique. 

 Legs same color as the body, the posterior coxae beneath and their fe- 

 mora and tibiae more or less obfuscated. Abdomen opaque, depressed, 

 deeply incised between the segments; basal segment squarely dilated at 

 tip, with a prominent tubercle on each side of the posterior third, the. 

 peduncle slender ; down the centre of each segment there is a slight 

 elevation. Length 6} lines; expanse of wings 13 lines. 

 Collection — Dr. J. Gundlach. One specimen. 



Trogus pusillus. n. sp. 



Black; face, orbits, annulus on antennse, collar, two lines on mesothorax, 

 pleura beneath, sides of scutellum and most of metathorax, white; legs and ab- 

 domen honey-yellow ; wings hyaline ; scutellum acutely elevated. 



Male. — Head rather large, black; the face, orbits, clypeus, mandi- 

 bles, except tips, and the palpi, whitish; the outer orbits cover the 

 cheeks on the lower half, but narrow as they approach the summit, 

 and instead of curving around to meet the frontal orbits, they continue 

 straight on the vertex and almost meet on the disk behind the ocelli ; 

 antennae nearly as long as the body, slender, porrect, black, with a 

 broad white annulus slightly beyond the middle. Thorax black, shining ; 

 mesothorax with two longitudinal white lines not reaching the scutel- 

 lum, in front the space between these two lines is tinged with rufous; 

 the collar, tegulae, a broad line before and a large spot beneath the 

 wings, connected with another very large spot which covers the entire 

 under surface of the pleura, all white ; scutellum elevated into a sub- 

 acute spine, black, its sides broadly white, as well as the carina on each 

 side anteriorly with which it is connected; postscutellum black; meta- 

 thorax obscure whitish, with a large subtriangular black spot on each 

 side, the surface is densely punctured and somewhat abruptly truncate 

 behind. Wings obscurely hyaline; nervures and stigma blackish, paler 

 at base ; areolet 5-angular. Legs rather slender, honey-yellow ; the 

 four anterior coxae, white. Abdomen elongate, depressed, smooth and 

 shining, honey-yellow; first segment with a prominent tubercle on each 

 side of the posterior third, the peduncle rather slender; basal foveae of 

 the second segment deep and transverse. Length ?>\ lines; expanse of 

 wings 5s lines. 



Collection — Dr. J. Grundlach. One specimen. 



This looks very much like an Ichneumon, and I would have described 



it under that genus, were it not for the elevated scutellum. 



Trogus tricinctus. n. sp 



Yellow, varied with brown and ferruginous; mesothorax with three brown 

 stripes; metathorax with two large triangular yellowish spots; abdomen with 

 three yellow bands: wings yellowish-hyaline. 



