no. 3604 GLYPTOSCELIS — BLAKE 35 



3. Prothorax without median bare line, surface dull opaque black. 



mexicana Jacoby 

 Prothorax with median bare line 4 



4. Elytral punctures fine and tending to be in double rows, widely separated by 



bare intervals cahitae, new species 



Elytral punctures denser and coarser sonorensis, new species 



Glyptoscelis sonorensis, new species 



Figure 27 



From 6 to 8 mm. in length, elongate oblong oval, shining dark 

 reddish brown to piceons, antennae and legs pale reddish brown; 

 prothorax with remnants of a median impunctate line, densely and 

 not coarsely punctate; elytra with small humeri, narrow, not much 

 wider than prothorax, a slight transverse depression below scutellum, 

 elytral punctation not so dense as on prothorax, white patches of 

 denser hairs in places. 



Head with interocular space slightly more than half width of head, 

 a median bare line down front, punctures not very dense or coarse 

 beneath the closely appressed white pubescence. Antennae extending 

 below humeri, reddish brown. Prothorax nearly as wide as elytra, 

 wider than long, not so convex as in G. prosopis, a median impunctate 

 line, otherwise with dense and rather fine punctation; pubescence 

 arranged in feathery downward-falling pattern from median line, 

 becoming more horizontal on sides. Scutellum with a few finer 

 white hairs. Elytra with weak humeri and short intrahumeral 

 sulcus, a slight transverse depression behind scutellum, elytral 

 punctation not so dense as on prothorax with some ridging, pubes- 

 cence white, thick, with patches of denser hairs arranged in lines 

 sometimes present. Body beneath thickly covered with white 

 pubescence. Legs reddish brown. Length 6.3-7.8 mm.; width 

 3-3.8 mm. 



Type: Male, California Academy of Sciences, and 24 paratypes, 

 of which 6 are in the U.S. National Museum. 



Type-locality: Alamos, Sonora, Mexico, Aug. 1, 1940, R. P. Allen. 



Remarks: This species closely resembles G. prosopis Schaeffer from 

 Brownsville, Tex., but has a less bulging occiput, a more marked 

 median bare line down the pronotum, less marked elytral humeri, 

 and the inner tooth on the claws is farther down near the base. The 

 elytral pubescence of the Sonoran species usually shows thicker 

 patches of white than is present in the Texas species, and the pubes- 

 cence over the head and pronotum is coarser than in G. prosopis. 

 The two species are very similar except for these minor differences. 



