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; Cataiina 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): punciatissimus , 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. pundula- 

 ius, 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): puhipennis, 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 pacijica are also described by Casey 

 from California, the former from Humboldt County, the 

 latter without precise locality. 



Isomira. — I. variabilis is exceedingly common on 

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

 up to moderate elevations in the Sierras; it occurs also 

 on Cataiina Island and is probably found throughout 

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

 is also quite common in the Sierras, in company with 

 ■the preceding: monticola is described from Lake Tahoe, 



