140 CALIFORNIA ACADEMY OF SCIENCES. 



common throughout the middle Sierras. There are 

 also in my collection three seemingly undescribed 

 species, one of which comes from San Diego and is the 

 smallest species in our fauna. 



Coenonycha. — C. rotundata, Yuma, Riverside, two 

 examples in March; a rare species: socialis, specimens 

 I have seen were said to have been taken in San Diego 

 County. 



Serica. — S. firnbriata and 8. mixta are both more or 

 less abundant throughout Southern California in early 

 summer, when they are often seen on the wing in the 

 early evening: elongatula, several specimens taken 

 under dead leaves in Ojai Valley, March: alternata, 

 Los Angeles and San Diego counties; less frequent than 

 mixta or fiinhriata: anthracina occurs in middle and 

 northern California: valida is probably not different. 



Plectrodes. — P. riversi, generally not common but 

 occasionally attracted in numbers to light; Pomona, 

 July: carpenteri, Los Angeles and Mojave Desert: pal- 

 palis, specimens so called are occasional in the vicinity 

 of Los Angeles: blaisdelli is not uncommon near San 

 Diego: sqiumiosa, from San Bernardino: fossiger and 

 pistoria are described by Casey from Los Angeles 

 County; the latter has been taken in some numbers at 

 Santa Monica by Mr. Rivers: pubescens was described 

 by Horn from specimens taken at Visalia; it is possible 

 that we have more names than species. 



Orsonyx. — 0. anxius, Needles and Yuma (Wickham). 



Diplotaxis. — D. moerens and D. tenuis are described 

 from the desert regions of San Diego County: subangii- 

 lata is occasionally abundant at Pomona, at light. Sev- 

 eral specimens of an undescribed species were taken at 



