76 BULLETIN 85, UNITED STATES NATIONAL MUSEUM. 



h^. Body dark reddish brown; thorax less strongly arched; dorsum 

 with slight and inconspicuous pubescence. 



frontalis sulcata Crawford . 



g^. Antennae one and one-fourth times width of head; vertex distinctly 



pubescent; posterior lobe of male anal valve smaller, more slender. 



ohtusa Patch. 

 a^. Posterior tibiae with two black spines on inner side and one outside; pronotum 

 usually shorter. 

 h^. Forewiags more or less maculated or banded, 

 c'. Notum distinctly pubescent; maculation of wings very extensive and con- 

 spicuous lohata, new species. 



<■-. Notum not pubescent; maculation much less extensive. 

 d}. Media and cubitus bordered with a dark band; marginal cells darkened; Rs 

 long and curved; female genital segment rather long; anal valve of male 



obtriangular tripunctata Fitch. 



d^. Posterior margin darkened from tip of clavus to tip of wing and through 

 both marginal cells; Rs short, straight; female genital segment short; 

 male anal valve small, with a rectangular posterior lobe. 



arizonse Aulmann. 

 6^. Forewings not maculated or banded. 

 ('. Prsescutum not distinctly longer than broad. 

 dK Antennae not over twice as long as width of head. 



e^. Genal cones usually fully or very nearly as long as vertex (sometimes 



scarcely over two- thirds as long), divergent, acute to subacute; Rs long 



and curved. 



/^ Forewings very broadly rounded at apex; thorax and vertex often more 



or less conspicuously striped or banded with yellowish white on a 



dark ground color ' varians Crawford. 



/2. Forewings more or less angulate at apex, not broadly rounded ; thorax 

 and vertex not as above. 

 gfi. Vertex conspicuously bulging forward; male anal valve with posterior 

 lobes short; female genital segment usually moderately long, some- 

 times short salicis Mally . 



g"^. Vertex not conspicuously bulging forward; female genital segment 

 very short, not longer than preceding ventral sclerite; genal cones 

 not very slender; forewings usually (not always) fulvous; vertex 



without deep sulcus maura Forster. 



e^. Genal cones not over two-thirds as long as vertex, or less. 

 /I. Forewmgs short, seldom over 2.5 mm. long; body small. 



g\ Genital segment of female short, less than half as long as rest of 

 abdomen; genal cones short, about half as long as vertex. 



salicis Mally. 

 g'^. Genital segment of female nearly or fully as long as rest of abdomen; 

 genal cones two-thirds as long as vertex. 

 h^. Female genital segment with a short styliform prolongation, very 



acute; clypeus small nicaraguensis Crawford. 



h^. Female genital segment without styliform prolongation; dorsal 



valve longer than ventral, acute; wings sometimes 2.8 mm. long; 



male forceps enlarged and hood-shaped at apex, .stylifera Patch. 



/2. Forewings more than 2.5 mm. long, usually at least 3 mm.; body larger. 



(See stylifera.) 



g^. Wings broadly rounded at apex; antennae about one and a half 



times width of head. 



h^. Male anal valve with a long posterior lobate prolongation with long 



hail's; forceps large, clavate at tip aylmeriss Patch. 



