^2 ACADEMY OF NATURAL SCIENCES 



3. C. ABDOMINALIS. — Green, polished ; feet white. 



Inhabits Indiana. 



Body bright green, brilliant : hypostoma purple : antennse 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 % one-tenth of an inch. 



MEDETERUS Fisch. 



1. M. LATERALIS. — Tergum pale, with a lateral series of 

 polished spots. 



Inhabits Indiana. 



Head silvery : proboscis and antennae yellowish, seta of 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 [170] 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. 



2. M. PUNCTIPENNIS. — Thorax variegated ; wings with brown 

 spots. 



Inhabits Mexico. 



Thorax olive-brown, trilineate ; middle line slender, dull yel- 

 lowish, obsoletely zigzag; outer lines cinereous with black 

 points : scutel brown, cinereous in the middle : wings hyaline, 

 with many irregular fuscous spots, hardly to be traced into four 

 bands : poisers yellow ; tergum cupreous, posterior margins of the 

 segments blackish : feet white ; tarsi blackish. 



Length nearly one-fifth of an inch. 



DOLICHOPUS F. Meig. 

 D. ABDOMINALIS. — Green; abdomen rufous. 

 Inhabits Indiana. 



Head silvery : antennse, first and second joints black, third 

 : thorax polished green : wings hyaline : abdomen, ex- 

 cepting the terminal joint, rufous : halteres white : pleura and 

 pectus blackish, pruinose : feet white ; tarsi dusky. 

 Length less than three-twentieths of an inch. 



[Vol. VI. 



