64 BULLETIN" 85, UNITED STATES NATIONAL MUSEUM. 



Thorax arched, large, pubescent, punctate. Pronotum long, flat; 

 mesopleurites extending forward almost to head. Prsescutum long, 

 broad, not as long as scutum. Hind tibiae with a spur at base ; all tibiae 

 with a conspicuous fringe of spines at apex. Wings large, broad, 

 broadly rounded at apex, subhyaline, fumate in apical marginal 

 area; about twice as long as broad; pterostigma large, long, darker 

 than adjoining membrane, pubescent; first marginal cell very large; 

 second marginal cell rectangular; all veins set biseriately with setae, 

 larger on basal and pterostigmal costa. 



Genitalia. — Male. — Genital segment rather large; forceps rela- 

 tively very large, directed cephalad, and as long as genital plate, with 

 a dorsal vertical epiphysis ; anal valve bi-dactylate ; the lower dactyl 

 staight, bidentate at tip; upper dactyl arcuate; base large. 

 Female. — Genital segment rather small, acute at apex; dorsal valve 

 distinctly larger and longer than ventral. 



Described from three males and four females collected in Chinan- 

 dega, Nicaragua, and Granada, Nicaragua, by C. F. Baker. 



Type in author's collection. 



Head more or less deflexed, seldom as broad as thorax; vertex 

 usually subtriangular to semicircular in outline; genae produced into 

 conical or lobate processes, or sometimes only spherically swollen; 

 frons covered by genae, as in PsylUnae, visible only as a minute 

 sclerite bearing the front ocellus. Antennae ten-segmented, variable 

 in length. Eyes hemispherical. Thorax, typically, well arched; 

 sclerites variable, as described for the genera. Hind tibiae with three 

 to four black spines at apex ; basal tarsus of hind legs without claw- 

 like spines present in Psylhnae. Wings typically hyaUne, elongate- 

 ovate, more or less angulate at apex; cubital petiole (M + Cu) nearly 

 always wanting, R, M and Cu arising together from the basal vein 

 (see Oero'psyTIa and Hemitrioza for exceptions) ; pterostigma wanting. 



The members of this subfamily bear a striking resemblance to 

 species of Psylla, but differ sharply in several respects: The more 

 slender body (usually), the absence of the "claws" on the basal 

 tarsi of the hind legs, the differently shaped wings and the different 

 venation of same. The presence or absence, and the number, of 

 spines on the hind tibiae and the basal tarsus of the hind legs seem to 

 be very constant characters, although not heretofore used, and 

 very valuable for classification. 



SYNOPSIS OF GENERA. 



0^. Media and cubitus never with a petiole, the three veins (radius, media, and cubitus) 

 arising at same point from basal vein. 

 ¥. Gense not produced into cones but more or less swollen spherically beneath base 

 of antennae Kmvayama Crawford. 



