36 OTIORHYTiTCHID^. 



[Horn. 



beous scales. Head and rostrum as in geminatus, scales unicolorous. Thorax 

 more than a-half broader than long, apex slightly narrower, sides strongly- 

 arcuate, disc coarsely but sparsely luinctured surface with plumbeous scales, 

 a darker vitta at the sides. Elytra liroadly oval moderately inflated, finely 

 striate, striae indistinctly punctured, intervals equal, flat, surtace densely 

 covered with cinereous or plumbeous scales. Body beneath as above. 

 Length .24-. 36 inch ; 6-9 mm. 



Cotyloid cavities of hind tibiae moderately cavernous, tip of tibiae with 

 narrow oval scaly space. This species is of more robust facies than any 

 other of the genus and may be known by the characters given in the table. 



Not rare in Owen's Valley, California. 



Group II. Rhl^opses. 



Rostrum quadrangular, broader in front, deeply sulcate above. Eyes 

 narrow, acute beneath. Tarsi not dilated, beneath spinulose, third joint 

 emarginate but not broader than the second. Corbels of hind tibiae feebl}^ 

 cavernous. Posterior coxae verj'' widely distant. Intercoxal process 

 broad, truncate, second abdominal segment much longer than the two 

 following united, separated from the first by a strongly arcuate suture. 

 Metasternal side pieces connate with the raetasternum without evidence of 

 sutures. Seventh joint of the funicle of the antennae very close to the 

 club. 



The form and vestiture of the tarsi separate this group from the Stranga- 

 liodes and the .structure of the abdomen from the Ophrj-^astes. The rostrum 

 and the scrobes are not unlike those of Ophryastes. 



One genus occurs in our fauna. 



RHIGOPSIS Lee. 



BMgopsis Lee. American Naturalist, 1874, p. 459. 



Rostrum quadrangular, slightly longer than the head, dilated at tip and 

 obliquely truncate above, upper surface deeply trisulcate, tip feebly emar- 

 ginate. Mentum slightly retracted. Scrobes deep, well-defined, slightly 

 arcuate in front, directed, toward the lower border of the eye. Eyes nar- 

 row, acute beneath. Antennae moderate, scaly, scape gradually stouter at- 

 taining the margin of the eye ; funicle 7-jointed, first two joints longer, 

 stouter and nearly equal, 3-7 short, gradually broader, club oval, indis 

 tinctly articulated. Ocular lobes prominent. Scutellum indistinct. Elytra 

 oval, feebly conjointly emarginate, humeri prominent, tuberculate. Meta- 

 sternal side pieces connate with the body without suture. Hind coxae xerj 

 widely distant, intercoxal process broad, truncate. Second segment of ab- 

 domen longer than the two following united, separated from the first by a 

 strongly arcuate suture. Tibia? not mucronate at tip, corbels of hind tibiae 

 feebly cavernous. Tarsi spinous beneath third joint feebly emarginate, 

 not wider than the preceding. Claws moderate, free. Body densely 

 covered with scales, almost entirely obscured by exudation coating. 



The tarsi of this genvis although narrow are by no means of the Byrsopide 



