APPENDIX. 201 



Page 168. Chrysotus niibilus. 



Blackish ; feet dull honey-yellow. 



Hab. Indiana. 



Body blackish ; head dull plumbeous ; thorax cinereous, with 

 three brown lines ; wings immaculate ; poisers white ; feet dark 

 honey-yellow ; thighs black at base and above. 



Length — rather over one-tenth of an inch. 



Page 168. Chrysotus continual ius. 



Green-brassy ; tergum blue towards the tip. 



Hab. Mexico. 



Head violaceous, with a cinereous reflection ; palpi with a cine- 

 reous reflection ; antennae black ; thorax green with a gray oliva- 

 ceous reflection ; wings hyaline, obsoletely tinged with yellowish 

 on the costal margin ; poisers white ; tergum with a gray reflec- 

 tion, brassy-green at base, and violaceous towards the tip ; thighs 

 green ; tibiae whitish. 



Length — one-fourth of an inch. 



Page 169. Chrysotus abdominalis. 



Green, polished ; feet white. 



Hab, Indiana. 



Body bright green, brilliant ; hypostoma purple ; antennae yel- 

 low ; thorax immaculate ; poisers yellow ; tergum, first segment at 

 base with an obsolete yellowish line ; feet white ; venter white, at 

 tip blackish purple. 



Length — g one-tenth of an inch. 



Page 169. Medeterus lateralis. 



Tergum pale, with a lateral series of polished spots. 



Hab, Indiana. 



Head silvery ; proboscis et antennae yellowish, seta of the latter 

 with the first joint very short ; eyes (when recent) green polished, 

 with a cupreous reflection ; thorax green, somewhat pruinose, 

 with a dorsal rather compound vitta ; wings hyaline ; poisers 

 whitish ; tergum dull yellowish, with a series of brassy spots on 

 each side, posterior two largest ; feet and venter whitish. 



Length — nearly three-twentieths of an inch. 



The dorsal vitta is impressed behind. 



