74 CALIFORNIA ACADEMY OF SCIENCES. 



Tachinus. — T. agilis and T. dehilis 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 memmonius. 



Tachyporus. — T. calif ornicus , exceedingly abundant 

 nearly everywhere; often seen flying at twilight in 

 spring and early summer: natidiUus, rare, Pomona, 

 Lake Tahoe. 



Cilea. — One example of C. silphoides from Pasadena, 

 taken in February (Fen yes). 



Erchomus. — A single specimen of E. punctipennis was 

 taken in the San Bernardino Mountains. 



Conosoma. — G. bipustulatmn, 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. nifescens is 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. hionidus, "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. 



Olisthaerus. — 0. megacephalus, included on the author- 

 ity of Fauvel; it is unquestionably northern. 



