1864.] 2S1 



15. Tryphon minimus, n. sp. 



Black : middle of face, clypeus, mouth, tegulee, broad sutural line before the 

 wings, spot on each side of pleura behind and the coxse and trochanters, yel- 

 low; legs and 3rd abdominal segment, fulvous: wings hyaline, areolet want- 

 ing ; abdomen subsessile. 



Fcniah'. — Black, polislied ; a large quadrate spot on the middle of 

 the face, clypeus, large spot on the mandibles, and the palpi, yellow ; 

 eyes prominent; antennj^ as long as the body, brown-black, the basal 

 joint beneath tipped with yellowish. Thorax : tegulag, a broad sutural 

 line before the wings, extending to the dorsal lines where it is suddenly 

 truncate, dilated and pointed before and behind, an irregular line be- 

 neath the fore-wings, a spot beneath the hind-wings and an elongate 

 spot on each side of the pleura behind just before the middle coxae, all 

 yellowish ; metathorax punctured, without elevated lines. Wings hya- 

 line, iridescent; nervures and stigma fuscous, pale at base; areolet 

 wanting ; 2nd recurrent nervure straight. Legs fulvous ; the posterior 

 tibias at tips and their tarsi obfuscated; all the coxae and trochanters 

 bright yellow. Abdomen subsessile or very nearly sessile, with a stout 

 tubercle on each side of the first segment near the base ; middle of the 

 two basal segments somewhat concave ; the apical margin of the 2nd 

 and the whole of the ord segments above, fulvous ; apical segments 

 polished. Length \% lines; expanse of wings 3 J lines. 



Hah. — Illinois. Dr. Samuel Lewis. 



16. Tryphon capitatus, n. sp. 



Black, polished; head, pectus, pleura, legs and 3rd abdominal segment, pale 

 fulvous; wings hyaline, stigma large, areolet wanting; abdomen subsessile. 



Male. — Head rather large; subquadrate, entirely pale fulvous, shin- 

 ing, face paler ; eyes small, round and black ; antennae as long as the 

 body, brown-black, the basal joint yellowish. Thorax polished ; meso- 

 thorax black ; tegulae, collar, pectus and pleura pale fulvous ; scutellum 

 and metathorax black, the extreme sides of the latter pale fulvous. 

 Wings ample, hyaline, beautifully iridescent; nervures fuscous, pale at 

 base, stigma large, black ; areolet wanting. Legs, with the coxae, pale 

 fulvous, the tips of the posterior tibiae, brownish. Abdomen subsessile 

 or slightly subpetiolated, subclavate, polished, black, the 3rd segment 

 pale fulvous ; basal segment with a prominent tubercle on each side of 

 the middle. Length 2 lines ; expanse of wings 4 lines. 

 Hah. — Pennsylvania. E. T. Cresson. 



