36 OTIORHYNCHID^. 



[Horn. 



beous scales. Head and rostrum as \n geminatus, scales unicolorous. Thorax 

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

 arcuate, disc coarsely but sparsely punctured surface witli plumbeous scales, 

 a darker vitta at the sides. Elytra broadly oval moderately intlated, finely 

 striate, strife indistinctly punctured, intervals equal, flat, surface 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 thC/ characters given in the table. 



Not rare in Owen's Valley, California. 



Group II. Khlgropses. 



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

 narrow, acute beneath. Tarsi not dilated, beneath spinulose, thii"d joint 

 emarginate but not broader than the second. Corbels of hind tibiae feebly 

 cavernous. Posterior coxfe very 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 metasternum without evidence of 

 sutures. Seventh joint of the funicle of the antennaj 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 Ophryastes. The rostrum 

 and the scrobes are not unlike those of Ophryastes. 



One genus occurs in our fauna. 



RHIGOPSIS Lee. 



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



Rostrum c^uadrangular, 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 very 

 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. Tibiae not mucronate at tip, corbels of hind tibiae 

 feebly cavernous. Tarsi spinous beneath third joint feebly emarginate, 

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

 covered with scales, almost entirely obscured by exudation coating. 



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



