xxxiii, '22] ENTOMOLOGICAL NE\YS 271 



connexivum ciliate beyond that point. Osteole without a 

 sulcus, opening behind a tumid elevation. Feet as in Pangacns. 



This is the first American genus of Cydnidae known to me 

 in which the ocelli are entirely wanting. This character, with 

 the spinose margin of the head and longer second antennal 

 segment will serve to separate it from Pangacns, its nearest 

 relative. 



Type: Pscctroccphalus coccus n. sp. 



Psectrocephalus caecus new species. 



Black, coarsely punctate ; antennae testaceous ; marginal cilia rufous. 

 Length 5 mm. 



Vertex and tylus nearly smooth, the latter transversely wrinkled 

 toward apex ; cheeks rugosely punctate ; marginal spines as long as 

 thickness of 3d antennal segment ; cilia about five times the length of 

 the spines and nearly equal to median width of cheeks ; anterior sub- 

 margin armed with a long bristle either side at base of bucculae ; 

 anterior disk of pronotum continuously smooth, the lunate anterior 

 margin and broad sides punctate, as is the posterior lobe ; punctures on 

 scutellum shallow, becoming closer posteriorly, the base nearly smootli ; 

 corium closely, deeply punctate ; membrane attaining apex of abdomen ; 

 beneath polished, impunctate, the osteolar area opaque. 



Color deep Black when mature, polished ; rostrum and antennae piceo- 

 testaceous, segments II and III of antennae darker; tarsi pale; mar- 

 ginal cilia and eyes rufous; membrane white, in one individual shorter 

 and sooty black. 



Described from two male and three female examples taken 

 as follows: Pasadena, California, October 12, 1016. one pair 

 taken among ants under a stone by Mr. J. O. Martin ; La 

 Jolla, California, one female taken by me under a stone, on the 

 hill back of Scripps' Institution, July 27, 1913; Laguna Beach. 

 California, one male taken by Prof. E. O. Essig, July 15. 1913. 

 and one female taken by Mr. C. T. Dodds at same place, July 

 7, 1921, both under stones. 



Holrfypr, male, No. 926, and allotype, female. No. 927, 

 Museum California .Academy of Sciences, from Pasadena. 

 Paratypes in collections of the Academy, in that of Mr. Harold 

 M. Jeancon and in lhat of the author. This species undoubted! \ 

 is an inhabitant of ants' nests and may be common in such 

 situations. 



