366 ACADEMY OF NATURAL SCIENCES 



ish-cinereous ; seta reclivate, robust, terminal joint longest : pro- 

 boscis black : palpi pale : thorax immaculate : scutel pale brown- 

 ish : wings dusky ; nervures blackish-brown ; costal margin, to- 

 wards the base brownish : feet black : tergum each side near the 

 base with a large, obsolete, reddish-brown spot; segments whitish 

 at base. 



Length nine-twentieths of an inch. 



Occurred rather common at Engineer Cantonment on the Mis- 

 souri, late in March, on a wounded tree from which much sap 

 had exuded. 



MESEMBRINA Meig. 



M. PALLIDA. — Honey-yellowish; wing nervures margined. 



Inhabits Indiana. [176] 



Body dull honey-yellowish : head pale yellow : front with a 

 reddish-brown vitta : antennae very short, hardly half as long as 

 the hjpostoma, terminal joint oval : nervures margined with 

 brownish : pectus, pleura and feet paler. 



Length two-fifths of an inch. 



CORDYLURA Fall. 



C. QUALis. — Dark cinereous, hairy; thorax trilineate ; head 

 with a cinereous reflection. 



Inhabits Indiana. 



Body blackish-cinereous : head hemispheric, dark plumbeous, 

 with a silvery reflection : eyes approximate above : antennae 

 blackish, rounded at tip; bristle short, two-jointed, thickened at 

 base : palpi hairy, black, dilated at tip : proboscis rather long, 

 slender, black : thorax obscurely trilineate with black and with 

 two less distinct oblique lines each side : wings slightly dusky : 

 tergum very hairy, black, when viewed from behind with a gray 

 reflection, except on the dorsal line and sutures: feet hairy, 

 black. 



Length $ one-fifth of an inch. 



DEXIA Meig. 

 1. D. VERTEBRATA. — Abdomen conic, pale yellowish, with a 

 dorsal black line and tip. 

 Inhabits Indiana. 



[Vol. VI. 



