36 E. T. CRESSON. 



7. Mesoleptus T bucephalus, n. sp. 



% . — l^lack, shining; face, cheeks, pleura and metathornx covered 

 with dense silvery pile; clypeus, base of antennajand prothorax more' 

 or less ferruginous; wings hyaline, beautifully iridescent, nervures 

 and stigma blackish ; legs pale honey-yellow, posterior feujora darker, 

 and with their tibiae and tarsi more or loss dusky ; incisures of abdo- 

 minal segments more or less pale. Head large, much swollen behind 

 eyes, which are rather large and ovate; clypeus large, convex, apex 

 slightly emarginate; mandibles large, hook-like, acute at tip ; antennae 

 as long as body, very slender, setaceous; prothorax pi'oduced into a 

 neck; mesothorax strongly gibbous, subtrilobed in front; scutellum 

 depressed; metathorax rounded, with sharply defined elevated lines ; 

 wings narrow, areolet wanting; legs long and very slender, tibial spurs 

 short, tarsal claws simple; abdomen petiolated, long and very slender, 

 first segment nearly as long as second and third together, stigmatic tuber- 

 cles prominent and placed at about the middle. Length 3] lines. 



Three % specimens. A very curiously formed insect. 



Genus TRYPHON, Grav. 



1. Tryphon croceiventris, n. sp. 



% . — Black, shining, face and metathorax pubescent; base of clypeus. 

 spot on mandibles, palpi, scape beneath, tegulm. spot beneath, scutel- 

 lum, spot on postscutellum, four anterior coxte and trochanters, and 

 their femora and tibise in front, lemon-yellow ; rest of clypeus fulvous ; 

 antennfe brown, pale at base, testaceous beneath ; wings hyaline, beau- 

 tifully iridescent, nervures brown; legs and abdomen safiFron-yellovv, 

 tips of tarsi blackish. Eyes large, clypeus with a broad, deep, trans- 

 verse impression ; antennae nearly as long as body, slender, filiform ; 

 meso- and metathorax and pleura smooth and polished ; metathorax 

 rounded ; areolet small, oblique ; legs moderately slender, tarsal claws 

 simple; abdomen elongate, subdepreSvSed, sessile, first segment much 

 longer than broad, remaining segments with a transverse impressed 

 line on each side behind the middle. Length 21 — 3 lines. 



Two % specimens. Looks much like a Bassus. 



2. TryphonT laticinctus, n. sp. 



5 . — Black; clypeus. mandibles, palpi, base of antennj\3. four anterior 

 cox» and trochanters, and second abdominal segment, except apical 

 blatik spot, yellowish-white; thorax ferruginous, most of pleura, and 

 metathorax except basal middle, black; wings hyaline, beautifully iri- 

 descent, tips dusky. Form short, robust ; head broad ; eyes very 



