276 [September 



sliffhtly dilated before reaching the base, the hiteral tubercles not promi- 

 nent, situated a little before the middle, disk faintly canaliculate ; be- 

 neath stained with whitish ; ovipositor subexserted. Length 3 lines ; 

 expanse of wings lines. 



H^^lj^ — Xew Jersey. E. T. Cresson. 



Section 3. 



(i. Tryplion'? trifasciutus, n. sp. 



Black, polished ; tea;ul£e, scutellum, postscutellum, part of metathorax. legs 

 and three bands on abdomen, yellow: wings subhyaline, areolet wanting : legs 

 short and thick; abdomen subpetiolated, clavate. 



Male. — Black, polished, clothed with a rather thin pale pubescence ; 

 head entirely black, eyes prominent, face narrow, palpi pale ; antennae 

 nearly as long as the body brownish above, yellowish beneath, the basal 

 joint beneath yellow. Thorax : the pleura protuberant beneath the 

 wino-s, with a deep cavity before and behind to receive the anterior and 

 intermediate femora in repose; scutellum and postscutellum yellow; 

 metathorax small, shining, pubescent, black with a large transverse 

 yelloAvish spot across its middle, sometimes obsolete, immediately be- 

 hind the postscutellum a well impressed point, and at the insertion of 

 the abdomen several short elevated ridges. Wings subhyaline, faintly 

 stained with fuscous ; nervures and stigma fuscous, the former pale at 

 base ; areolet wanting, the 2nd recurrent nervure very much angular 

 near its base. Legs short and thick as in Exochus ; yellow, the poste- 

 rior cox£e beneath and the apical half of their femora, black ; sometimes 

 the four anterior femora exteriorly, the tips of the posterior tibire and 

 tips of all the tarsi, are blackish. Abdomen subpetiolated or slightly 

 subsessile, clavate, polished, bjack, the apical half of the three basal 

 seo-ments yellow ; basal segment somewhat canaliculate or cariuated on 

 the disk towards the base. Length 5 lines ; expanse of wings 7? lines. 

 }j^ah. — Pennsylvania. Mr. Chas. A. Blake. 



Section 4. 



7. Tryphon americanus, n. sp. 



Black: face, palpi and four anterior legs, yellow; abdomen, except basal seg- 

 ment, rufous ; wings hyaline, areolet triangular. 



Male. — Head black, the fVtce beneath the antenna}, clypeus. man- 

 dibles except tips, and the palpi, yellow ; immediately beneath the an- 

 tennse a lono-itudiual, abbreviated, blackish line and on each lateral mar- 



