342 PROCEEDINGS OP THE ACADEMY OP 



striae of the elytra are deeper than the inner ones, and the intervals in some 

 places are marked with faint traces of obsolete intermediate striae. 



19. Cyllidium nigrellum, hemisphaericum, nigrum nitidum, elytris parce 

 subtilissime punctulatis, stria suturali profunda antice obliterata, pedibus 

 piceis. Long. - 06. 



San Diego, California. The sides of the thorax and elytra are diaphanous, 

 and therefore appear brown by transmitted light. 



20. Cyllidium pallidum, hemisphaericum, nitidum, capite thoraceque 

 piceis, hoc limbo omni pallido, elytris pallidis, parce subtilissime punctulatis, 

 stria suturali profunda antice obliterata ; subtus piceum, antennis palpis pedi- 

 busque pallidis. - 05. 



At the j unction of the Colorado and Gila rivers, California, under stones 

 and pieces of wood, in wet places.* 



21. Thinopinus variegatus; Trichocanthus variegatus Motsch. A speci- 

 men found by Mr. Davidson at Bodega differs in many respects from those of 

 T. p ictus Lee, found by me at San Diego. The head is destitute of the 

 Y-shaped frontal spot, which in T. p i c t u s is connected with the occipital trans- 

 verse spot ; the latter is much more defined, and different in shape. The two 

 ring-shaped black spots of the thorax are interrupted opposite the hind angles 

 of the thorax, but the basal portion is complete ; in T. p i c t u s it is the lat- 

 ter that is absent. The elytra are sparsely but strongly punctured, the lateral 

 margin and a semiannular spot extending from the base to the external hind 

 angle is black ; in T. p i c t u s the elytra are very feebly punctured, and the 

 elytral spot is annular, interrupted towards the humerus. The spots of the 

 dorsal surface of the abdomen are much larger, than in T, p i c t u s. 



22. Hadrotes extensus. Several specimens found by Mr. Gibbs in 

 Washington Territory differ from the Russian American H. crassus, by the 

 body being much more slender, and the thorax comparatively longer. In 

 sculpture I find no difference, but the form of the thorax and body requires 

 them to be regarded as indicating a separate species, to which the present 

 name is applicable. 



23. Staphylinus submetallicus, aeneo-niger, pubescens, capite thora- 

 ceque nigro-aeneis, confertissime punctatis, illo linea tenui laevi antice oblite- 

 rata, hoc latitudine longiore, lateribus parallelis, vitta dorsali nitida laevi ; 

 scutello atro-tomentoso, elytris nigro-aeneis, densissime subtilius punctatis ; 

 abdomine dorso pube subtili aureo-variegato bifariam nigro-maculato. Long. 

 62. 



Tejon; Mr. Xantus, one specimen; another one from Mr. Murray. The 

 outer joints of the antennae are somewhat transverse. 



24. Staphylinus saphyrinu s, niger pubescens, capite thoraceque laete 

 cyaneis, dense punctatis, illo linea tenui ltevi antice obliterata, hoc latitudine 

 longiore, postice paulo angustato, vitta dorsali nitida laevi, elytris cyaneis 

 densissime subtilius punctatis, abdominis segmentis duobus ultimis, palpis, 

 coxis pedibusque laete rufo-testaceis, antennis piceis basirufescentibus. Long. 

 40 -52. 



San Jose and Fort Tejon, California. The outer joints of the antenna? are 

 slightly transverse. 



25. Staphylinus luteipes, niger, pubescens, capite thoraceque olivaceo- 



* I add the description of a third species from the Atlantic district. 



C. nigriceps, hemisphaericum, supra pallide testaceum nitidum, capite nigro, 

 thoracis disco obscuriore, elytris parce subtiliter punctulatis, stria suturali antice 

 obliterata; subtus nigro-piceum, antennis palpis pedibusque pallidis. Long. -06. 



Lake Superior, one specimen. 



[Nov. 



