310 NORTH AMERICAN TRYPETINA. 



Altogether yellowish, except the ovipositor, which is dark ferruginous, 

 not flattened, and nearly as long as the last four abdominal segments 

 taken together. Scutellum with four bristles ; the black picture of the 

 wings shows, on the apex, handsome, although short, rays ; it is 

 sparsely guttate towards the posterior angle, very sparsely in the 

 middle of the wing ; the first posterior cell contains but a single drop; 

 the third longitudinal vein is bristly. Long. corp. 0.26 — 0.27 ; long, 

 al. 0.26. 



A rather conspicuous species, of the same coloring as the European T. 

 valida Lw. With the exception of the ovipositor, it is altogether yellowish, 

 only the basis of the abdomen is sometimes brownish. Front of a middle 

 breadth and somewhat convex ; its brownish-yellow or reddish-yellow 

 bristles are comparatively strong ; the frontal lunule rather large. Antennae 

 short, by far not reaching the edge of the mouth ; the second joint bears 

 a conspicuous bristle ; the anterior edge of the mouth considerably drawn 

 up, but not very projecting in the profile. Eyes not very high ; cheeks 

 broad. Oral opening rounded, rather large ; proboscis not geniculate ; 

 palpi rather broad, reaching abundantly as far as the anterior edge of the 

 mouth. The short pile on the thorax is partly pale ferruginous, partly 

 pale yellowish-red ; the usual bristles are pale yellow or brownish-yellow. 

 The somewhat convex scutellum has four bristles. Metathorax and 

 pleurae yellow, like the rest of the body. Abdomen likewise uniformly 

 yellow, but there are specimens the abdomen of which is infuscated at 

 the basis ; the pile on the abdomen is like that on the thorax, only its 

 coloring is more yellowish. The stout, conical ovipositor is not flattened 

 at all, about as long as the last four abdominal segments taken together ; 

 in paler specimens it is reddish-brown with a black tip ; in darker speci- 

 mens it is rather brownish-black ; it is beset, as far as the tip, with com- 

 paratively long pile, which assumes a more yellowish hue near the basis, 

 a more brownish one near the tip; in darker specimens it is sometimes 

 blackish-brown. Feet altogether yellow. Wings hyaline with a very 

 much expanded and very little perforated black reticulation, which is 

 radiated at the apex of the wing. The root of the wings is not spotted 

 nearly as far as the end of the small basal cells; the costal cell contains 

 a gray crossline near the humeral crossvein, a brownish-black crossband 

 upon its middle, and a crossline of the same color at its extreme end ; the 

 obliterate end of the auxiliary vein, running perpendicularly towards the 

 margin of the wing, is rather hyaline ; the stigma is altogether black and 

 does not include any hyaline drop ; immediately beyond the stigma near 

 the anterior margin, there are two cuneiform hyaline spots, the first of 

 which is a little broader than the second and crosses the second vein a 

 little further; between these spots and the end of the second vein the 

 brownish-black coloring is entirely unbroken ; five short brownish-black 

 rays of almost equal length run towards the apex ; the first ends between 

 the second and third longitudinal veins, the next two coincide with the 



