100 BULLETIN 85, UNITED STATES NATIONAL MUSEUM. 



Described from two males from California, one from Placer County, 

 the other from Castle Peak, Nevada County, both collected by 

 A. Koebele in September. 



Type.—Qsii. No. 18091, U. S. Nat. Mus. 



This is close to immaculata, in some respects, differing chiefly in 

 head characters. One of the two specimens bears the manuscript 

 name of Trioza frontalis Riley. 



NEOTRIOZELLA LATICEPS Crawlord. 



Figs. 206, 214, 349, 538. 



Trioza laticeps Crawford '10a: 233. 

 Neotrioza laticeps Crawford '11a: 450. 

 Neotriozella laticeps Crawford 'lib: 503. 



Length of body 1.6 mm.; length of forewing 2.7; width of head 0.62. 

 General color dark brown, thorax lighter; head and genal cones 

 black. 



Head strongly deflexed, distinctly broader than thorax, slightly 

 punctate; vertex rather sharply defined on margin, scarcely impressed 

 discally, slightly emarginate over front ocellus; genal cones not 

 longer than vertex, acute, more abruptly converging to apex than in 

 immaculata, vertical or retrose, slightly pubescent. Antennae very 

 slender. 



Thorax arched, narrow, punctate, slightly pubescent. Wings 

 hyaline, narrower than in immaculata, relatively longer usuall}^ 

 subacute at apex. 



Genitalia. — FemaZe.— Genital segment almost as long as rest of 

 abdomen, very acute at apex; dorsal valve longer and larger than 

 ventral, very acute. 



Described from one female collected by G. R. Pilate in Louisiana. 

 This is very close in many respects to immaculata. 



Type.— Chi. No. 18092, U. S. Nat. Mus. 



Genus CEROPSYLLA Riley. 



Ceropsylla Riley '83: 76. 

 Triozoida CuAWTORT) 'lib: 491. 



Head deflexed, not as broad as thorax; vertex more or less plane, 

 except postocellar areas conspicuously elevated, bulging lobately m 

 front between antennal bases, with front ocellus not or scarcely 

 visible from above; genal cones short to long, separated but not 

 strongly divergent, vertical. Gense swollen close behind antennal 

 sockets; clypeus at least moderately large (very prominent in ]ohn- 

 sonii). Antennae usually not over twice as long as width of head. 

 Thorax arched; pronotum short; strongly descending cephalad, 

 depressed below level of vertex and prsescutum. Hmd tibiae with 

 two apical spines within, and one outside. Wings hyaline, usually 



