74 CALIFORNIA ACADEMY OF SCIENCES. 



Tachinus. T. agilis and T. debilis are both rather 

 widely distributed and moderately common. The genus 

 is better represented farther north, semirufus and angus- 

 tatus occurring in the middle regions, and tachypo- 

 roides, pallipes and instabilis in the upper portions of 

 the State. A female specimen taken at Lake Tahoe is 

 referred somewhat doubtfully to memnonius. 



Tachyporus. T. calif ornicus, exceedingly abundant 

 nearly everywhere; often seen flying at twilight in 

 spring and early summer: natidulus, rare, Pomona, 

 Lake Tahoe. 



Cilea. One example of C. silphoides from Pasadena, 

 taken in February (Fenyes). 



Erchomus. A single specimen of E. punctipennis was 

 taken in the San Bernardino Mountains. 



Conosoma. G. bipustulatum, Wilmington and Santa 

 Barbara (Horn); I have an example from the middle 

 Sierras: castaneum , not rare in or under decaying wood, 

 especially in the foot-hills of the Sierras; fungivorous 

 according to Horn. 



Boletobius. B. cincticollis is common in mushrooms. 



Bryoporus. B. rufescensis said to occur from "Penn- 

 sylvania to California;" I have not seen California 

 specimens. A single specimen of a possibly undescribed 

 species has been taken at Pomona. 



Mycetoporus. M. humidus, "Michigan to Florida 

 and west to California;" I have not yet seen it here: 

 splendidus or a closely allied species has been found in 

 the Santa Cruz Mountains. 



Habrocerus. H. tarsalis is described from San Mateo. 



Olisthserus. 0. megacephalus, included on the author- 

 ity of Fauvel; it is unquestionably northern. 



