lltlD] American Species of Platymetopius 221 



vertex is shaped almost exactly as in the male of aciitus, but it is 

 shorter than in the female actUiis with which sex I assume 

 Prof. Baker may have compared his specimens. The female 

 has a much longer vertex, its length being somewhat more than 

 twice its width between the eyes. In color this species is still 

 paler than in the variety dubius of the preceding species. It is 

 of a light fulvous, paler and almost immaculate beneath; the 

 face is pale with but ver}' faint infuscation on the base of the 

 front and sides of the cheeks but with the angular white lines 

 on the former distinct. 



This species is best distinguished by the form of the genital 

 pieces; The valve of the male is more angled and subacute at 

 apex; the plates are larger with their outer margins distinctly 

 concavely arcuated and their apices a little divergent and sub- 

 acute. The last ventral segment of the female is conispicuously 

 longer and narrower than in acutiis with its apex slightly 

 subangularly produced. 



7. Platymetopius latus Baker. 

 Can. Ent. xxxii, p. 50. 1900. 



I have one female of this species taken by Mr. W. J. Palmer 

 of this city at Quinze Lake, Quebec, which agrees perfectly with 

 Prof. Baker's Colorado type received from Dr. Howard. It 

 may be distinguished by its fusiform shape, narrow pointed head 

 with a vertex twice as long as its width between the eyes, the 

 broad flaring elytra, the almost uniform coloring which is ful- 

 vous-brown above, without irrorations on the vertex, pronotum 

 and scutellum, and almost without elytral reticulations or white 

 areolar spots, the nearly concolorous nervures, those of the 

 costal areole being a little more distinct, and the uniforml}^ pale 

 yellowish-testaceous coloring beneath with the base of the front 

 darkened only at the extreme tip and not showing the angular 

 white m.ark. Genital characters nearest to those of acutus; 

 the last ventral segment a little more angled and the pygofers 

 smaller. This is a rare species and probabh^ is confined to 

 northern Canada and the higher regions of the Rocky Moun- 

 tains. 



S. Platymetopius cuprescens Osborn. 

 20th Repl. X. Y. Slate Ent. p. 517, 1905. 



Another closely allied species which comes nearest to acutus 

 but has a longer and sharper vertex, about as in dubius and 

 oregonensis; the elytra are more infuscated with but slight traces 



