240 billetin: museum of comparative zoology. 



Arachnophroctonus unicolor Viereck. 



Calif.: Leinoncove, Tulare Co., 9-11 July, Dulzura, San Diego Co., 

 15 August, Three Rivers, Tulare Co.; Wash.: Wenas Valley, 6 July, 

 1SS2. 



Arachnophroctonus ferrugineus (Cresson). 

 Calif.: Claremont, National City, 15 May. 



Aporinellus. 



1. Legs partly reddish californicus. 



Legs all black 2 



2. Abdomen (except last two segments) wholly sericeous completus. 



Abdomen black with sericeous bands or spots 3 



3. Abdomen with complete silvery bands across apex of each segment above. 



apicatus. 

 Abdomen without complete bands 4 



4. Pronotum and pleura noticeably marked with silvery; wings dark at tips. 



inter medius. 



Pronotum and pleura not noticeably marked with sericeous; wings. nearly 



uniformly blackish medianus. 



Aporinellus californicus Rohwer. 

 Calif.: Alameda Co. 



Aporinellus completus Banks. • 

 Wash.: Yakima River, Kittitas Valley, June, July, 1882. 



Aporinellus apicatus Banks. 



Calif.: National City, 15 May, Felton, Santa Cruz Mts., 20-25 

 May, Berkeley, 16 September. 



Aporinellus medianus Banks. 



Calif.: Ramona, 15 August, Los Angeles, May, Sequoia National 

 Park, 6 August, Lemoncove, Tulare Co., 9 July, El Cajon. 



