CICADELLINAE : PART I. PROCONIENI 31 



Strongly rugose, occasionally with short niicrosetae, posterior margin 

 concave, dorsopleural carinae complete, with each carina rectilinear 

 in lateral aspect, or arched slightly dorsally at middle; proepimeron 

 with a short, posteriorly directed process at midlength of posterior 

 margin; scutellum transversely striate or not on posterior half. Fore- 

 wing usually whitish opaque and without a membrane, in some species 

 coriaceous or subhyaline with inner apical cell membranous; veins 

 varying interspecifically from obsciare to elevated and distinct, surface 

 finely punctate in clavus and corium, with more than four apical 

 cells, the relative lengtlis of apical cells variable, with a network of 

 veins in apical half of corium, and occasionally in clavus and basal 

 half of corium, with or without anteapical supernumerary crossveins 

 to costal margin; wings of female in rest position entirely concealing 

 ovipositor. Hindwing extending almost as far posteriorly as forewing, 

 vein R2+3 incomplete. Hindlegs with femoral setal formula quite 

 variable (2:0:0; 2:1:0; 2:1:1; 2:1:1:1) intraspecifically; first tar- 

 somere shorter than combined length of second and third. 



Male genitalia: Pygofer not strongly produced, with numerous 

 evenly dispersed microsetae, without processes. Plates not fused, 

 extending as far as, or usually not as far posteriorly as, pygofer apex, 

 broad and truncate with numerous evenly dispersed microsetae. 

 Style interspecifically variable in length compared with connective, 

 with distinct preapical lobe, apex either simply rounded or variously 

 modified, nearly always with a few anteapical lateral microsetae. 

 Connective longitudinal, usually Y-shaped with arms short and very 

 slightly divergent. Aedeagus usually curved posterodorsally, sym- 

 metrical, with or without shaft processes which are rarely asymmet- 

 rical. Paraphyses usually present and paired or with processes from 

 base of aedeagal shaft (rarely arising more posteriorly from ventral 

 portion of shaft). 



Female abdominal sternum VII quite variable. 



Diestostemma has a wide Neotropical distribution from Mexico to 

 Paraguay and Bolivia. It is placed here near Proconia, with which it 

 shares the peculiar character of the scar at the apex of the head. Other 

 similarities are discussed under Proconia (p. 29). The presence of 

 the digitate posteriorly directed process on the posterior margin of 

 the proepimeron will readily separate Diestostemma from other proconi- 

 ine genera. 



Leucopepla Kirkaldy was based on the character of elevations of the 

 dorsum of the pronotum, but in other characters it is similar to typical 

 Diestostemma, and the pronotal character intergrades to typical Diestos- 

 temma. Heterostemma Melichar was erected for a small number of species 

 which are brownish in color and with the forewings having the venation 



