3G8 APPENDIX. 



nervures of the wings differ somewhat from those of the 

 S. notata, Linn. Meig. ; the marginal nervures do not ap- 

 proach so near the tip of the wing, and instead of a single 

 nervure between the forked nervure and the undulated 

 nervure, as in the notata^ this species has two. 



T3IBI0, Latr. Meig. 



B. thoracica. Black ; thighs rufous. 



Inhabits East Florida. 



Body black, somewhat polished ; thorax bright yellow- 

 ish-rufous, with a small black spot on each side of the scu- 

 tel; collar, scutel, and metathorax black; spines of the 

 anterior tibiae piceous, the exterior one much larger ; wings 

 fuscous ; the fourth marginal nervure abbreviated, and not 

 attaining to the inner margin. 



Length 9 two-fifths of an inch. 



This is a very large and fine species. On the thorax is 

 sometimes an obsolete brown line. 



BERIS, Latr. 



B. viridis. Bright green ; tergum black-brown ; venter 

 pale ; feet yellowish. 



Inhabits Pennsylvania. 



Head brassy-green, polished; antennse obscure, yellow- 

 ish, brownish at tip ; proboscis and palpi whitish ; stethi- 

 dium green, polished; scutel with four yellowish spines; 

 wings hyaline ; stigmata large, fuscous ; nervures fuscous, 

 those of the costal margin anterior to the stigmata whitish ; 

 central areola destitute of an abbreviated nervure, two ner- 

 vures passing oflf from the tip, and a third from very near 

 its hd&Q-ypoisers white ;/ce^ pale yellowish, tarsi dusky at 



