02b APPENDIX. 



mctathorax scabrous, black on the disk ; ivings fuliginous- 

 black ; /?/ettr« d.n(\ pectus blackish, the former with an ob- 

 solete, longitudinal line beneath the wings ; thighs piceous 

 in the middle ; posterior pair black in the middle ; abdomen 

 compressed almost to flatness, piceous-black, margins of 

 the segments paler; elongate-oval; rounded, but sharp- 

 edged at tip ; tergum, and venter also with sharp edges. 



Length nearly seven-tenths of an inch. 



This species is not of very common occurrence. It is 

 very closely allied to Banchus cultellator, Fabr. 



CHALCIS, Fabr. Latr. 



1. C. microgaster. Slender, black; anterior pairs of feet 

 and posterior tarsi, yellowish ; peduncle as long as the ab- 

 domen. 



Inhabits Pennsylvania. 



Stethidium with dilated, dense punctures ; metathorax 

 with an angulated line above the insertion of the abdomen; 

 wings hyaline, costal nervure fuscous \ posterior feet black ; 

 tarsi yellowish ; first joint of the coxae with a small acute 

 tooth above near 'the tip ; thighs as large as the abdo- 

 men, with numerous, small, regular teeth on the posterior 

 edge ; tibise, terminal spine longer than the first joint of 

 the tarsi; abdomen polished, a little compressed, triangu- 

 lar, the superior angle rounded. 



Length less than one-fifth of an inch. 



'Z. C. ovata. Robust, bladi ; feet yellow, thighs black at 

 base, head with a golden reflection. 



Inhabits Ohio and Pennsylvania. 



Head black, with golden sericeous hair, which is indis- 

 tinct on the vertex ; antennae testaceous beneath towards 

 the tip ; stethidium with dilated, dense punctures, a little 



