ART. 18 JASSID GENUS TYPHLOCYBA McATEE 17 



claspers stout at base, approximate medianly, very abruptly curved, 

 the acute apices directed outwardly, and a little backwardly. Con- 

 nective very broad at base, almost equilaterally triangular. 

 Aedeagus but little longer than connective, bifid, the rami stout at 

 base, gradually tapering, up- and in-curved the apices acute (fig. 38). 



Female. — Colored like male. Eighth sternite emarginate laterally, 

 the median lobe shorter and less pointed than in 2'. gillettei and 

 itself slightly emarginate. 



Length, 3.5 mm. 



HoJofype. — Male, allotype and paratype, females, Toronto, Ont., 

 August 8, 1924, some of them labeled Crataegus^ E. D. Ball (Ball). 



The color pattern of this species is almost exactly that of T. gil- 

 lettei, var. casta; however, the ground color is decidedly milky 

 white, which it rarely is in that variety, and the genitalia of both 

 male and female are distinct. 



TYPHLOCYBA FLAVOMARGINATA Gillette and Baker 



Typhlocyba flavomaiffinata Gillette, C. P., and Cabl F. Baker, A prelimi- 

 nary list of the Hemiptera of Colorado, Bull. 31 (Tech. Ser. 1) Colo. 

 Agr. Exp. Sta., June 7, 1895, pp. 111-112, 4 figs. [Mauitou, Colo.]. 



Male. — For color characters see key to color varieties and descrip- 

 tions farther on. Hypopygium (fig. 40) : Upper posterior angle of 

 ninth segment moderately produced in a rather rounded incurved 

 angle that is not so obvious from the side as from a dorsal or inside 

 view of the segment, lower angle receding and rounded. Outer 

 claspers as seen from below gradually narrowed from base; on the 

 outer side is a thin vertical crescentic plate extending from near base 

 to apex of clasper. The inner claspers (fig. 41D) are fairly stout at 

 base, much narrowed and approximate at about their middle length, 

 then divergent with a more or less prominent tooth on outer side at 

 beginning of posterior fourth, where the clasper is abruptly bent 

 inwardly and downwardly, the apex aciculate. (This clasper differs 

 from that of all the other American species seen in the apex, being 

 directed inwardly instead of outwardly. The claspers of T. gratiosa 

 Boheman are similar but the aedeagus is different.) Aedeagus short 

 and stout at base, hardly longer than connective, divided just distad 

 of middle into two strongly divergent rami which are inflated at 

 base, and abruptly tapered at about the middle into inwardly and 

 downwardly directed slender aciculate processes (figs. 41-42). 



Female. — For color characters see key to color varieties and de- 

 scriptions farther on. Eighth sternite with the posterior angles 

 developed as prominent rounded lobes, a broad rounded emargina- 

 tion between them, the center of which is slightly notclied (fig. 

 108). 



Length, 3.5-4 mm. 



79654—26 3 



