256 



U.S. NATIONAL MUSEUM BULLETIN 261 



Figure 246. — Dechacona missionum (Berg) (a, b, j from specimen labeled 

 "type;" c-g from allotype of Z). minor (Osborn) from Paraguay): j, ventral 

 view of apex of abdomen of female. 



margin, disc punctate and coarsely pubescent, posterior margin con- 

 cave, in lateral aspect w^ith a complete dorsopleural carina which is 

 nearly rectilinear; scutellum pubescent, its posterior portion weakly 

 striate. Forewing with membrane including apical cells only, veins 

 obscure, texture strongly coriaceous, punctate and pubescent in clavus 

 and corium, with four apical cells, base of fourth slightly more proximal 

 than base of third, claval veins parallel, without an anteapical plexus 

 of veins and without anteapical supernumerary crossveins to costa, 

 wings of female in rest position exceeding ovipositor. Hindwing at 

 rest extending almost as far posteriorly as forewing; vein R2+3 incom- 

 plete. Hindlegs at rest with knees not attaining posterior proepimeral 

 margins; femoral setal fonnula 2:0:0; first tarsomere with length 

 approximately equal to combined length of second and third tarsomeres. 

 Male genitalia: Pygofer moderately produced, posterior margins 

 broadly rounded, disc with numerous evenly dispersed microsetae on 

 apical two-thirds, without processes. Plates separate throughout their 



