CYDNIDAE OF THE WESTERN HEMISPHERE — FROESCHNER 515 



bucculae low to moderately high, reaching nearly to base of head; 

 labium variable in length, reaching to middle coxae or as far as base 

 of abdomen, II compressed but without a semicircular foliaceous lobe 

 above, II and III usually subequal and longer than I or IV. 



Pronotum: Length about three-fourths width, narrowed from base; 

 anterior margin moderately and broadly emarginate; lateral margins 

 carinate, arcuate for full length or straight to wealdy concave on basal 

 half or more, submarginal row of 6 to 25 coarse, setigerous punctures; 

 posterior margin broadly rounded; transverse impression near mid- 

 length, varying from distinct to obsolete, usually marked with a row 

 or band of coarse punctures; male of some species with a broad, shallow, 

 median, subapical impression. 



Scutellum: Width equal to or shorter than length, triangular, apex 

 narrowed, narrower than half the length of the coriomembranal 

 commissure; disc with widely, irregularly scattered fine or coarse 

 punctures. 



Hemelytron: Polished, more or less punctured throughout; corio- 

 claval suture distinct; clavus usually with single row of coarse, close-set 

 punctures for most of its length; costal margin with 0-22 setigerous 

 punctures; membranal suture nearly straight; membrane almost two- 

 fifths hemelytral length. 



Propleuron : Surface polished or closely and finely punctured and/or 

 striated, depression usually punctate; prosternal carinae low, obtuse, 

 area between them sunken. 



Mesopleuron: Flattened; evaporatorium extensive, reaching poste- 

 rior and lateral margins of segment, sometimes entire (fig. 109) and 

 sometimes interrupted by posterior, submarginal polished spur ex- 

 tending mesally from lateral area; posterior margin finely crenulate; 

 mesosternum swollen and partly carinate along midline, with a number 

 of long, fine hairs on apical half. 



Metapleuron (fig. 109): Flat; evaporatorium reaching about two- 

 thirds across segment; osteolar peritreme extended about half way 

 across evaporatorium, without a differentiated apical structure, osteole 

 opening posteriorly at base of subapical "hook." 



Legs: Moderately long; anterior tibia (fig. 123) compressed, not 

 surpassing tarsal insertion, dorsal margin with eight to ten stout, 

 blunt spines; middle tibia stout, somewhat compressed, spines of 

 postero ventral margin longer and more slender than those of dorsal 

 margins; posterior tibia (fig. 142) distinctly compressed, spines re- 

 stricted to dorsal and ventral margins, those of posteroventral margin 

 longer and more slender than those of dorsal margin ; tarsi 3 -segmented, 

 II shortest. 



Sternites: Polished, with or without rows of setigerous pmictures 

 across segments; segmental sutures entire or finely crenulate. 



