338 : Hlisteride in San Diego County. [ ZOE 
Jossularis; mandibles rather strongly curved and shorter. Length 
17.5mm. Rare. Found in decaying Echinocactus viridescens. 
HoLoLepta cacti Lec. Very abundant in decaying cacti, fre- 
quently taken from beneath the bark of decaying and water-soaked 
wood of the willow. Mentum concave, with strongly elevated lines; 
prosternum narrowed and almost acute at tip. 
HOLOLEPTA vicINA Lec. Common from July to November. 
Found in the decaying fruit of Cucurdita. Mentum concave with- 
out elevated lines; prosternum slightly narrowed, truncate, and 
slightly emarginate at tip. 
HOLOLEPTA NEGLECTA sp. nov. Narrower and more elongate 
than vicina. Mentum feebly concave, lines rudimentary; pros- 
ternum slightly narrowed, subtruncate. Sides of prothorax quite 
evenly arcuate. Sides: of body moderately arcuate. Length 7 
mm. Found in decaying squashes. Rare. This species was identi- 
fied for me as /ucida, but is entirely different in habitat from 
specimens subsequently obtained of that species. 
HOLOLEPTA POPULNEA Lec. Taken from decaying cacti in the 
eastern or desert portion of the county; common in Arizona. 
HISTER SELLATUS Lec. Not common; in spring and early sum- 
mer observed flying about sandy places near streams, also found 
about the roots of plants. Elytra are marked with red. 
HISTER SEXSTRIATUS Lec. Common; observed flying about on 
warm days in spring, also found at the roots, of grasses and beneath 
bark in rotten wood; a large black species. 
HISTER MILITARIS Horn.’ In some seasons quite common. Fre- 
quents the sandy banks of streams, and beneath débris in same local- 
ity. Smaller species with each elytron marked with a red line. 
TRIBALISTER MARGINELLUS Lec. Rare; taken from beneath 
rocks in moist places. 
| TRIBALUs CALIFoRNICUS Horn. A very small species and abun- 
dant beneath bark, rocks, ete., in permanently moist places. I once 
observed some six or eight individuals feeding upon a living Mela- 
notus longulus. | 
PAROMALUs opUNTIa Lec. Common; found in decaying fruit of — 
species of Cucurbita, leaves and stalks of Opuntia occidentalis. 
