262 NORTH AMERICAN TRYPETINA. 



from the tip of the first than from that of the second vein. I take 

 this crossvein to be a constant character of the species, as it 

 exists on both wings of my specimen, and as several closely allied 

 Trypetidae, for instance Gonygl. Wiedemann! and Caprom. vesu- 

 viana, have it likewise, although incompletely developed. The 

 picture of the wings is not unlike that of T. atra, in its design 

 as well as in its coloring ; the black spot upon the basis of the 

 wings does not cover their extreme root, and extends, on the 

 anterior margin, only very little beyond the humeral crossvein ; it 

 hardly reaches beyond the first longitudinal vein, and dissolves in 

 several radiating points, which occupy the longitudinal middle of 

 the marginal and of the three basal cells and almost come in con- 

 tact (except the hindmost), with similar rays, meeting them from 

 the opposite side and emitted by the first crossband ; the first 

 black crossband has almost the same position as in the three pre- 

 ceding species, but it is much narrower, especially towards its 

 end, which reaches the posterior margin ; its interior does not 

 show any brownish tinge. The second band runs over both cross- 

 veins, exactly as it does in those three species, and is connected 

 with the first on the anterior margin in the same manner as this 

 is the case in T. atra; the stigma, lying within this connecting 

 portion, is very short ; the veins surrounding it have, on the 

 inner side, a very narrow hyaline border; the interior of the 

 second band is for the most part brownish. The last black band 

 begins in the marginal cell somewhat beyond the supernumerary 

 crossvein in this cell, and reaches some distance beyond the end 

 of the fourth vein ; as far as this vein, it is separated from the 

 margin of the wing by a narrow hyaline border, which somewhat 

 projects on the inside on the second and third veins; beyond the 

 fourth vein the band comes in immediate contact with the margin 

 of the wing ; the inside of this band is brownish upon the ante- 

 rior two-thirds of its course. 



Sab. Texas (Belfrage). 



Observation. — The differences between the present species and 

 the three preceding ones are evident: they consist in an aberrant 

 arrangement of the bristles of the front and of the thoracic dorsum, 

 in the size and shape of the third antennal joint, and in the pre- 

 sence of the crossvein, dividing the marginal cell ; nevertheless 

 the agreement between those species in most of the other plastic 

 characters, in the shape of the body and in the picture of the 



