1902.] NATURAL SCIENCES OF PHILADELPHIA. 41 



ttj. — Femora and tibise of anal legs armed with a single spine at the 

 inferior angle; tibise, except of anal legs, unarmed; first 

 tarsal joint, except in last pairs, armed above and below with 

 one spine, second joint armed beneath; processes of last 

 pleurae with a stout spine, , . californieiisis, sp. uov. 8. 



1. Theatops posticus (Say). 



Cryptops postica Say (1831). 

 TheatojJS postical^ew\)ort (1844). 

 Opisthemega postica Wood (1862). 

 Opisthemega crassipes Meinert (1886). 

 Theatops crassipes Bellman (1888). 



Habitat. — Eastern United States, south of Virginia, Indiana 

 and Illinois. 



2. Theatops spinioaudus (Wood). 



Opisthemega spinicauda Wood (1863). 

 Theatops spinicaudus Bollman (1888). 



Habitat. — Acapulco, Mex., and southwestern United States, 

 extending northeast through Tennessee to Pennsylvania. 



3. Theatops californiensis spec. nov. 



Brown, feet and autennse yellowish ; head sparsely punctate, sub- 

 oval, posteriorly truncate ; dorsal scuta sublightly, sparsely punc- 

 tate, deeply bisulcate, first plate triangularly impressed anteriorly; 

 ventral plates sparsely lightly punctate. Articles of the antennae 

 17, terminal articles densely shortly hirsute, median and basal joints 

 sparsely shortly hirsute. Prosternal teeth 3-3, large, short ; coxal 

 tooth large, stout, obtuse. None of the tibise armed either beneath 

 or above; first joint of tarsus, except in ultimate and penult pairs, 

 armed below and above with one spine, the second tarsal joint 

 armed beneath. Anal legs much crassate, contiguous, moderately 

 short, claw long, strong, superior internal margin carinate; femur 

 armed on the inferior interior margin with a single, rather stout 

 tooth; tibia armed similarly to femur. Last ventral plate long, 

 wide, the sides scarcely sinuate, strongly converging posteriorly, the 

 posterior angles rounded, posterior border gently sinuate ; last pleurre 

 wide, subsmooth, posteriorly Avidely sinuate, processes armed ^\ith a 

 stout spine or tooth. 



Length 41-46 mm. ; width 4 mm. ; length of anal legs 7-8 mm. 



Habitat. — Near Quincy, Cal. 



Found at a mining claim, altitude 3,500 feet, by ^Iv. Edward 

 Garner. 



