176 CALIFORNIA ACADEMY OF SCIENCES. 



in separating them to my satisfaction. It is certain 

 that the color of the legs is not a specific character, 

 these being usually red in the males and black in the 

 females. 



Hymenorus. H. infuscatus, Los Angeles, Pomona, 

 June; Catalina Island, July: grandicollis, specimens 

 occurring at light on Echo Mountain were so identified 

 by Casey; a different species in the collection of Dr. 

 Fenyes, and taken at Palm Springs, fits the description 

 of grandicollis still better: fusicornis, Riverside and 

 Pasadena, April and May; rare: fusculus, Coronado, in 

 decaying sunflower blossoms (Blaisdell): macer, Poway, 

 common, (Blaisdell): punclatissimus, Riverside, Po- 

 mona; June to October; not rare. Blaisdell reports 

 inquilinus as occurring in the nests of the agricultural 

 ant, in Calaveras County, in September. H. punctula- 

 lus, H. discrepans, and H. uniseriatus are Calif ornian, 

 but without definite locality. 



Mycetochares. M. longipennis is rare at Pasadena, 

 March (Fenyes): procera, Los Angeles (Casey); Pasa- 

 dena, April (Fenyes): pubipennis, Pasadena and Re- 

 dondo, March. All the above are more or less rare. M. 

 nevadensis I have beaten from pines at Lake Tahoe, in 

 July: crassulipes and pacifica are also described by Casey 

 from California, the former from Humboldt County, the 

 latter without precise locality. 



Isomira. 1. variabilis is exceedingly common on 

 ilowers, especially of greasewood, in the foot-hills, and 

 up to moderate elevations in the Sierras; it occurs also 

 on Catalina Island and is probably found throughout 

 the region to the west of the mountains. 1. luscitiosa 

 is also quite common in the Sierras, in company with 

 the preceding: monticola is described from Lake Tahoe, 



