THE CANADIAN ENTOMOLOGIST, 37 



bisinuate. Plate in male evenly rounded ; valves narrowly, strongly 

 produced, exceeding the plate by twice its length ; tips straight. 



Colour pale yellowish-fuscous on the head and thorax, the latter 

 sometimes with three faint longitudinal fuscous stripes. Front more or 

 less washed with rufous. Elytra whitish-subhayline ; sternum black. 

 Abdomen above black except margins of segments. Venter yellow. 

 Length, 3 mm. 



The above description was prepared from Colorado specimens 

 determined as straight abdominalis by Mr. VanDuzee. The distribution 

 of the species in Colorado, as far as determined, is given in Prelim. List 

 Hemip. Colo. In this State it has been recorded from barley and sugar- 

 beet. The species was originally described from New Jersey (Smith). 

 I have before me, also, specimens from the collection of the 111. State Lab. 

 Nat. Hist., bearing data as follows: June 19, on wheat j July 27 ; Sept. 

 17, on wheat. 



In the original description, Mr. VanDuzee says of the male genitalia: 

 " Valve large, as long as the two apical ventral segments taken together ; 

 apex angled, subacute. Plates but little surpassing the valve, etc." 

 However, in our specimens — determined by Mr. VanDuzee — they are as 

 described above. In this genus, within certain limits, the genitalia are 

 variable in form. Moreover, as among Typhlocybids, many marked 

 changes are produced in the genitalia by drying, so that most characters 

 drawn from these parts require verification in fresh specimens. 



In this species the ocelli are rather nearer to the eyes than is usual 

 in the genus. 

 Gnathodus impictus, VanD. 



1892. VanDuzee, Can. Ent., XXIV., p. 113. 

 1894. VanDuzee, Trans. Am. Ent. Soc, XXL, p. 307. 

 Head narrower than the pronotum. Face one-sixth wider than long. 

 Front two-sevenths longer than wide, twice the length of the clypeus. 

 Clypeus as broad at tip as at base, sides subparallel, tip strongly, evenly 

 rounded. Genae broad below the lorae. Vertex distinctly produced. 

 Pronotum little less than twice wider than long, length two and a-half 

 times that of the vertex, hind margin distinctly incurved, curvature less 

 than half the length. Ovipositor about equalling pygofers. Hind margin 

 of last ventral segment of female truncate or slightly incurved. Plate in 

 male strongly rounded ; valves strongly produced; tips as long as discs, 

 slender, incurved at apex ; valves and pygofers with strong white spines. 



