238 CALIFORNIA ACADEMY OF SCIENCES. 



elytra; it is the smallest of the group and has never 

 been found far from the California seacoast. 8. f rater- 

 nus and S. consobrinus have the sutural stria entire, 

 while in 8. mancus and S. laxatus it is indistinct or 

 wanting behind the middle. 8. mancus is a northern 

 species; S. laxatus is larger and less densely sculptured, 

 and is known only from Florida. 



49. Acritus volitans, sp. nov. 



Broadly oval, moderately convex, rufopiceous, legs and antennae a little 

 paler. Head finely and sparsely, but rather strongly, punctulate. Second 

 antennal joint twice as long as the third, the latter nearly as long as the 

 fourth and fifth together, eighth a little wider than the preceding. Thorax 

 strongly narrowed from the base, the sides broadly arcuate, punctuation 

 fine and rather sparse, nearly uniform throughout; a transverse basal row 

 of larger punctures extending to the middle of the elytra and curved for- 

 ward in front of the scutellum. Elytra a little more coarsely punctate, 

 the punctures feebly aciculate behind the middle, uniformly distributed, 

 separated by from two to three times their own diameters; marginal stria 

 of the inflexed flanks of the elytra fairly distinct, deeper toward the base; 

 sutural and discal striae entirely wanting. Pygidium finely, rather 

 sparsely punctate. Prosternum about one-half longer than wide, with a 

 few very feeble scattered punctures; the striae equally divergent before 

 and behind; meso-metasterual plate very finely, sparsely punctulate at 

 middle, more coarsely at sides and posteriorly; metasternal suture oblit- 

 erated, its position defined by a transverse row of elongate punctures 

 somewhat similar to those on the prothorax; marginal stria of mesoster- 

 num rather broadly interrupted at middle. Anterior tibiae but slightly 

 broader than the middle. 

 Length, 1 mm. 



Ten examples taken at Pomona and Pasadena from 

 May to September. All occurred flying in early even- 

 ing, or at electric lights. 



By the characters given in Horn's table, this species 

 should stand between A. exiguus and A. jioridce. 



50. Stenelmis nubifer, sp. nov. 



Elongate, parallel, finely pubescent. Head and prothorax black with- 

 out lustre, the apices of the front angles rufescent; elytra dull yellow 

 with a broad diffuse median cloud; beneath fuscous or fuscoferruginous; 



