240 Natural History Bulletin. 



alis. The disk is very convex, middle fovea large, hidden by 

 a bunch of long, convergent hairs, giving the appearance of a 

 sharp-pointed tubercle; transverse sulcus very fine, lateral 

 foveae small. Elytra equal in length to their width across 

 the shoulders, which are not prominent; disk rather convex, 

 base bifoveate, sutural lines parallel, converging in the pos- 

 terior fourth, discal lines none, replaced by an ample but 

 shallow basal impression. Abdomen longer than the elytra, 

 convex in both directions, border wider, retuse, the basal seg- 

 ment shorter than the second or third, which are equal, longi- 

 tudinally very convex and depressed at the base; no median 

 basal tubercle visible. Legs long, the anterior trochanters of 

 the male with a long, bluntly-pointed spine, anterior thighs 

 with a small, sharp thorn on the basal, and a minute sharp 

 tubercle on the second third. Posterior tibite spurred, tarsi 

 with long hair on the sole. 



One specimen 5. Williams, Arizona. H. F. Wickham. 



We have placed this species in Tyrus, but the form of the 

 prothorax and head resembles more closely Hamotiis 

 batrisioides while the antenncS, palpi and locomotive organs are 

 those of Tyrus, thus demonstrating the close affinity of these 

 two genera. 



Ha.motus, Aube. 

 ( Cercocents, Motsch. ) 



Pubescence loose, coarse, and long; head not constricted 

 behind the frontal tubercles, eyes finely facetted. Elytra and 

 abdomen very convex. Palpi with the second joint fusiform, 

 third compressed subglobular, fourth elongate fusiform. 

 Second and third tar|Sal joints equal, claws two, equal. 



H. BATRISIOIDES, ' ZiJC. Umber brown, elongate, convex, 

 polished pubescence long, coarse, yellow, not appressed; 

 punctuation faint, irregular, punctures large. Length, 1.8 

 mm. Plate VII., Fig. 22. 



Headdi'?, broad as long, very convex; eyes large moderately 



