COLEOPTERA OF SOUTHERN CALIFORNIA. 191 



diffused throughout the United States, but much more 

 common in the Atlantic district: hesperum has been 

 found only by Coquillett in the desert portions of Los 

 Angeles County: sordidum is an abundant species in the 

 desert but very uncommon west of the mountains; 

 specimens have been taken in May at Pomona and 

 Pasadena; it has been bred from galls on several occa- 

 sions — notably by Mr. Koebele from "Cecidomyid and 

 dipterous galls on Artemisia calif arnica," and by Mr. 

 Schwarz from "bud-like gall on stems of Hymenoclea 

 monogyra in Arizona: antennaium is not rare, on pines 

 in both the southern and middle Sierras, July; taken 

 also at Pomona in January, Catalina in July, and Ven- 

 tura in March: cedorhynchum is common throughout our 

 region, April to October: opacicolle, Ojai A^alley, March; 

 uncommon: troglodytes is plentiful from San Diego to 

 San Francisco, December to May: jwoclive is abundant 

 nearly everywhere both east and west of the mountains; 

 it has been beaten from willows at Pomona, March to 

 October: cribricolle is widely distributed throughout the 

 State, and is generally abundant; common on Eriogo- 

 num cinereum at Redondo in Spring, but occurs on a 

 variety of plants and trees. A. cordatum is rare at 

 Pomona, where specimens have been beaten from willows 

 in October: varicorne is plentiful at Yuma, in July, on a 

 species of Dalea: ventricosum is very abundant on the 

 desert, occurring on mesquite: attenuatum is rather 

 rare; specimens have been taken at Pomona, Pasadena 

 and Riverside. Two other species — protensum and 

 walshii — have been found within the State; the former 

 is known by the unique type taken at San Francisco, 

 while the latter has been found only in the north. 



Podapion. — P. gallicola, middle and northern Sierras; 

 not common. 



Lepyrus. — L. perforatus is northern. 



