274 [April 



yellow, almost confluent with a large bright yellow spot on extreme 

 side. Wings rather ample, yellowish-hyaline, with a slight purplish- 

 iridescent reflection ; areolet rhomboidal. Legs long and slender, bright 

 yellow; the posterior coxae except the tips beneath, basal half of their 

 trochanters, all the femora behind, except extreme base and apex, and 

 the apical third of the posterior tibiae, black ; posterior tarsi varied with 

 dusky. Abdomen subsessile, arcuated, fusiform, subcompressed, black, 

 smooth and polished ; each segment above with a bright yellow apical 

 band, very broad on the three basal segments and narrow on the others, 

 those on the first and second segments strongly sinuate anteriorly, and 

 that on the fourth segment dilated on the middle anteriorly ; venter 

 compressed, black, banded with yellow. Length 5$ lines; expanse of 

 winss 11 lines. 

 One specimen. 



2. Banchus spinosus, n. sp. 



Black; face, orbits, clypeus, mandibles, basal joint of antennae beneath, two 

 spots on front of mesothorax, two lines on pleura, scutellums, metathorax be- 

 hind, legs and bands on abdomen, yellow or orange-yellow ; scutellum with a 

 long acute spine; wings yellowish-hyaline. 



Male. — Black, shining, very closely punctured ; face, except a broad 

 line down the middle, frontal orbits, a dot on each side of anterior 

 ocellus, a line on the outer orbit, clypeus except basal margin, and 

 most of the mandibles, yellowish; clypeus excavated on the disk; palpi 

 blackish ; antennae nearly as long as the body, curled and slender at 

 tips, black, the basal joint beneath yellow. Thorax : a triangular spot 

 on each side of the mesothorax anteriorly, tegulae, and a line beneath, 

 a narrow line ou the anterior margin of the pleura, and a spot beneath 

 the base of the posterior wing, yellow ; scutellum prominent, polished, 

 yellow, with a long acute blackish spine on the disk, pointing behind ; 

 postscutellum also yellow ; metathorax finely and densely sculptured, 

 its posterior face yellow, abrupt, bounded above and on the sides by 

 a sharply defined carina. Wings ample, yellowish-hyaline, with a brassy 

 gloss, and a slight iridescent reflection; nervures and stigma fuscous; 

 areolet moderate, subtriangular. Legs long, especially the posterior 

 pair, orange-yellow; the coxae black, the two anterior pairs yellow in 

 front, the posterior pair with two short yellowish lines on the outside ; 

 tips of the posterior tibiae and their tarsi except base, dusky or black- 

 ish. Abdomen strongly arcuated, broad and compressed, black, the 

 apical margins of the four basal segments broadly yellow, more or less 

 tinged with orange, a spot on each side of the fifth and sixth and most 

 of the seventh segment, of the same color ; basal segment narrow, with 



