308 ENTOMOLOGICAL NEWS [Oct., 'l8 



Elytra without striae. Eyes very prominent, head, thorax, and elytra, 

 alutaceous and subopaque, with punctures hardly evident, longitu- 

 dinal thoracic line well defined. Length 2-2.5 mm- (Marin and San 

 Mateo Cos., Cal.) subopacus n. sp. 



Eurystethes (Aegialites) subopacus n. sp. 



Oblong, dull greenish blue above, alutaceous. subopaque legs and 

 under surface rufo-piceous, the femora somewhat greenish. Head 

 flattened, minutely and sparsely punctate, with a short longitudinal 

 frontal impression and a broad shallow one to the inner side of each 

 eye; eyes small, coarsely granulate, and prominent; antennae just reach- 

 ing posterior margin of thorax, somewhat club-like, the tenth joint 

 transverse. 



Thorax slightly broader than long, somewhat narrower at apex than 

 at base, widest in front of middle, sides distinctly arcuate, disc slightly 

 convex, with broad shallow median impression running from apex to 

 near base, secondary impressions on either side just anterior to middle, 

 and with a few widely scattered and barely perceptible punctures. 



Elytra oval, truncate at apex, wider behind, without distinct striae 

 and distinct punctures, and with four shallow transverse impressions 

 giving them a wrinkled appearance. Pygidium exposed. Underside 

 sparsely and finely punctured. Length 5 2 mm., breadth i mm., 9 

 length 2.2s mm. 



Type $ and 2 in my own collection, taken at Moss Beach, 

 San Mateo County, California, July 7th, 1912, from the crev- 

 ices of the inter-tidal rocks. A third specimen was secured 

 later on at the same locality and a fourth from near the mouth 

 of Tomales Bay, Marin County, California. 



This very distinct species, because of its subopaqueness and 

 lack of elytral striation, could not be confused with any of 

 the known species. As indicated in the key, its very prominent 

 eyes, short body, and non-shining appearance, would suggest a 

 certain relationship to E. stejncgcri Linell,* a species from 

 the opposite side of the ocean. The only other beetle which 

 has been associated with those mentioned in the table is E. 

 persica Mots.,^ a species undoubtedly not congeneric with 

 them. 



Mr. E. A. Schwarz and H. S. Barber, of Washington, have 

 materially aided me in this paper by suggesting and looking 

 up references for me. 



*Canad. Entom. XXX (1898), p. 74- 

 SBull. Mosc. XVIII (1845), P- 33- 



