252 On the Hymenoptera of the Genns 



cult to determine whether this is a variety or separate 

 species. 



XXX. Abdomen black. 

 Sp. 31. A. angidifer. Nov. spec. Black ; a lobate 

 black spot upon the head ; a V spot on prothorax, an 

 angulate mark on the pleura, and body beneath, white. 

 (Long. 0.47 in. Ex. alar. 0.90 in.) 



Black; antennas long and slender; head wide, pale 

 yellow ; the back and all of summit, and a lobate spot on 

 vertex, black ; the lower three fourths of orbits yellow ; 

 clypeus produced, moderately emarginate ; labrum and 

 mandibles fringed with pale hair ; wing-scale, edges of 

 collar, a V on prothorax, two dots behind scutellum, two 

 slender, radiating lines above and below these dots, a 

 broad, angulate mark on pleura, a spot near base of poste- 

 rior coxEB, and the whole body beneath, pale yellow ; some 

 indistinct, pale marks at junction of first four segments of 

 tergum ; legs pale yellow ; on the two anterior pair a black 

 line above, from middle of femora to feet, interrupted near 

 base of tibisB ; posterior coxae black above at base ; apical 

 half of femora, apex of tibiae, and the tarsi above, black ; 

 apical joints pale ; wings hyaline ; nervures and stigma 

 black, and base of stigma and costa pale ; third submargi- 

 nal cellule rather long. 



Var. a. Sides of first four segments of abdomen pale 

 yeUow, and the remaining segments rufous ; pleura almost 

 entirely yellow, with an irregular angulate spot beneath 

 wings ; coxbb yellow ; tarsi rufous ; posterior legs black on 

 the upper side only ; wings somewhat clouded. 



^ The male is black, long, and slender, with five large, 

 pale, diamond-shaped spots on tergum, at the joints of five 

 basal segments of tergum ; pleura with a black spot as in 

 Variety a. Color of body and legs beneath pale greenish 

 yellow; posterior tibiae and tarsi black, with a white spot 

 on tibiae above ; apical joints of all the tarsi green ; wings 

 hyaline. 



