188 POMONA COLLEGE JOURNAL OF ENTOMOLOGY 



12. The rows of teeth overlap ; fingers one and a half times longer than 



hand ; no tooth under the sting ; body mostly unicolorous 



Tityiis fenuimanus. 



The rows of teeth do not overlap ; fingers twice as long as hand ; a 

 tooth under the sting ; body and legs more or less maculate ; cauda of 

 male especially long Isomctrus maculatns. 



13. A distinct tooth below sting; fingers but one-fourth longer than hand ; 

 median keel of the fifth caudal segment reaching to tip. (Fig. 



81 , A B ) Centrums caJifoniiciis. 



No distinct tooth below sting; fingers one-half longer than hand; 

 median keel of fifth caudal segment lost in the general granulation ; 

 Cauda more slender. (Fig. 81, C D) Centnirus cxUicauda. 



Opisthacautlius lepturus Pal de Beauv 



This is a large, very dark-colored species, with very large claws, and a 

 very small tail ; it occurs in the American tropics, and has been taken from the 

 islands ofif the Californian coast. 



Diplocentrus keyserlingi Karsch 



This is a Mexican species of which there are specimens in the Marx 

 collection labelled "California." It is nearly black. There is another Mexi- 

 can species closely similar in appearance, but with the cephalothorax smooth, 

 not granulate ; it is D. zvhitci Gerv., and may possibly be taken in California. 



Broteochactas allenii Wood 



This is a small and short species, with large hand and very short fingers ; 

 it was described from Baja California, but I have seen specimens from Ft. 

 Tejon, Calif. 



Hadrurus hirsutus Wood 



This is our largest species of scorpion ; it is reddish yellow, or brownish, 

 and unmarked ; the legs and palpi are noticeably long-haired. Specimens have 

 been seen from Indio, Tulare County, Salton, San Bernardino County, the 

 Mohave Desert, and Palm Springs. 



Uroctonus mordax Thorell 

 This is a very dark-colored species, with large claws, apparently rather 

 connnon in central and northern California ; s])ecimcns are from Lakeside, 

 Lake Chabot, San Francisco, Fresno County, Sausalito, Camp Meeker, Sonoma 

 County, Napa County, and Santa Rosa Island. 



Anuroctoniis phaiodactylii.s Wood 

 This is rather larger than the last species, of a red-brown color, rather 

 hairy, and jjeculiar on account of the swollen sting in the male. Specimens 

 are from Witch Creek, and Cuyamaca Mountains, both in San Diego County, 

 from the Mohave Desert, and Claremont. 



