40 CYRTIDAE OF NORTH AMERICA 



Synopsis of Species 



1. Entirely black or blackish brown johnsoni new species 



With more or less red or yellow on the body 2 



2. Outer discal cross-vein present; three posterior cells. Small species. 



analis Westwood 

 No outer cross-vein. Two posterior cells 3 



3. Second abdominal segment mostly black; black spots on dorsum of third and 



fourth. Scutellvma black. Western species mlsella O. S. 



Larger species, usually with more yellow on abdomen. Scutellum yellowish 

 or whitish in female. Eastern species flavipes Gray 



Pterodontia analis (PI. VI, fig. 20.) 



Plerodontia analis Westwood. 



Pterodontia vix TowTisend, Proc. Cal. Acad. Sci., iv, p. 607, (1895). 



"Black, apical segments of abdomen fulvous, margin of squamae blackish, 

 wings hyaline, veins whitish, legs pale. Length 2 lines. Expanse of. wings 5 

 lines. 



"Hab. Georgia. 



"Type. British Museum. 



"Black, shining, black pilose, finely punctate. Head black, eyes posteriorly 

 brown. Antennae inserted above mouth opening, terminal joint slender and 

 short, apex furnished wdth setae. Thorax and scutellum black. Abdomen 

 hemispherical, two basal segments and spot in middle to base of next following 

 segment black. All the rest of the apical part of the abdomen fulvous. Wings 

 hyaline, iridescent, transversely rugose. Veins whiti.sh and distinct; discal cell 

 'sub apicem alarum postice aperta.' Tegulae fuscous, margin blackish. Legs 

 whitish, base of femora darkened, ungues black." 



Townsend (141) described this species as P. vix. One specimen 

 was taken in Southern California. Length, 5 mm. 



Pterodontia flavipes (PI. VI, fig. 22.) 



Pterodontia flavipes Gray, in Griffith, Animal Kingdom, Ins., xv, pi. cxxvii, 



fig. 3, (1832). 



9 . Head quite small, button-like, much as in the species of Ocnaea; seen in 

 profile the occiput takes up about half of the head and is black, gray pollinose. 

 Eyes and occiput long black pilose. Ocellar tubercle not very prominent. 

 Antennae yellowish, small and inconspicuous, placed near the rim of the 

 mouth. First joint of the antennae scarcely visible, second short and rounded, 

 third short and flattened, with three terminal setae (see fig. 22a). The mouth- 

 parts are aborted, but palpi are present. 



Thorax large, shining black above and black pilose. Scutellum whitish 

 yellow, thinly black pilose. Pleura and humeri brown, the upper pleura 

 remarkably swollen. Praescutellar callosities w^hitish yellow. Squamae 

 brownish hyaline with heavy blackish brown margins and blackish pile. 

 Halteres dull brownish yellow. 



