96 NEW YORK STATE MUSEUM 



Professor Mik in the Wiener Ent. Zeitung, 1894, p.l64, says: 



" Dieses Geader liisst sich oline Miihe auf jenes der Gattnng 



Corj'Doneura ^^'innertz zuruekftihren ( Yergl. V. d. 



Wiilp Dipt.— Needed. 1877. ri.YITT. flg.6), ohne dass idi 

 liierniit etwa den Bestand der Gattung Tersesthes anzweifeln 



mochte " Upon comparison of this description with 



that of L e p t o o n o p s Skuse, and of pl.So, fig.lO, with fig.l4, 

 it will be seen that these genera are certainly very closely related 

 if not identical. The only marked difference is that L e p t o - 

 c o n o p s has two small basal palpal joints while Tersesthes 

 is said to have but one (i.e. L e p t o c o n o j) s has four-jointed 

 and T e r s e s t h e s three-jointed palpi) . Only one species. 



Tersesthes torrens Townsend 

 1893. Tersesthes Town. Psyche. 371 



Female. General color blackish; eyes dark brown; antennal 

 excavations cinnamon color, nearly three times the diameter of 

 first antennal joint; front, face and lancets shining black, the 

 front with four blackish hairs on vertical margin arising from 

 four papillae; antennae black, clothed with whitish pubescence; 

 palpi blackish, labium brownish with some whitish pubescence 

 terminally; occipital orbits with a few black hairs. Thorax and 

 scutellum deep shining black, smooth, glabrous, excejjt that the 

 thorax has some scattered black hairs anteriorly. Abdomen soft 

 opaque brown, varying to light brown, in some of the specimens 

 fiavous or rufous at base; balsam mounts showing two oval black 

 spots (bodies?) at base of fifth segment; ovipositor brownish. 

 Legs blackish, tarsi brownish, tibiae slightly so. Wings grayish 

 hyaline, with hardly a smoky flavous tinge, the delicate fringe 

 of hind margin somewhat longest on anal angle where it termi- 

 nates abru})tly ; veins pale, excejjt first and second longitudinal 

 veins, which are brown and end in a brown stigma on costal 

 margin (the first vein becomes obsolete just before reaching 

 stigma) ; halteres brownish, knobs whitish. 



Lengtii of body (inc. ovipositor), one and three-fifths milli- 

 meters (empty) to two and one-fifth millimeters (abdomen 

 distended with blood) ; of wing one and one-fifth millimeters. 

 Fresh and alcoholic specimens are slightly longer. Described 

 from both dried and alcoholic specimens and balsam mounts. 

 vSix s](ecimens collected June 21, on Continental divide, Socorro 

 countv N. Mex., 7000 ft. 



