REVISION OF STREPSIPTEEA PIEECE. 123 



about one-half as long as wide. Mesothorax with apical angles pro- 

 duced obliquely backward. Elytra a little longer than the width 

 of the mesothorax, ladle-form with the hollow of the spoon ventral, 

 much wrinkled. Under a compound miscroscope a small hook is 

 discernible beneath the base of each elytron and apparently attached 

 thereto. In diameter it is about one-quarter the width of the elytron. 

 Below this is the very delicate hairy mesostigmatal lobe belonging to 

 the mesosternum and broadly attached to the second quarter of the 

 lateral edge. The lobe presents a broadly convex surface to the hook, 

 but ventrally shows a folding parallel with its edge, which creates a 

 channel leading back to the base, where it is narrowed by an anterior 

 lobe and a posterior acute ridge, which form the guardians to the 

 almost circular orifice of the mesostigma. The lobe is about once 

 and a half as long as the basal width of the elytron. Metathorax 

 with praescutum keystone shape; scuti about twice as long as wide, 

 almost meeting behind the praescutum, at which point they are later- 

 ally broadest; scutellum triangular; postlumbium transverse, short; 

 femoralia linear, long; postscutellum broadest near its base, rounded 

 at the apex, over twice as long as broad at broadest point. Wings 

 with seven primary veins, arising at the base. The radius is inter- 

 rupted at the node, beyond which interruption it immediately forms 

 an open loup and continues in the original direction. A short vein 

 occurs between this and the medius and another between the medius 

 and cubitus. Prosternum narrow, band-like, hardly one-fourth as long 

 as the mesosternum. Coxae transverse, not contiguous, apparently 

 open behind ; trochanters elongate subcylindrical, over twice as long as 

 coxae; femora elongate, slender, nearly twice as long as trochanters 

 and slightly curved; tibiae elongate, slender, equaling femora; tarsi 

 four-jointed, first three joints subequal, obliquely truncate and cup- 

 shaped at apex for reception of the following, ventrally and laterally 

 produced into velvety underlapping pulvilli; last tarsal joint as long 

 as the three preceding (to its own base), forming a very delicate 

 enlarged conical cup with the apex obliquely truncate from near the 

 middle of dorsum. The pulvilliform parts of the tarsi are thickly 

 matted with sharp hairs. Mesosternum broader than long; coxae 

 apical, open behind, contiguous on inner edges, transverse; tro- 

 chanters longitudinal, contiguous on inner edges, sinuately curved 

 on outer edges, femora equaling trochanters plus coxae, inflated at 

 basal third, narrowed beyond apical third ; tibiae subequal to femora ; 

 tarsi as on anterior legs. Metasternum elongate; legs apical; coxae 

 contiguous, cylindrical, length and breadth subequal, cupped for the 

 reception of the trochanters; trochanters flaring toward apex, longer 

 than broad, obliquely cupped for the reception of the femora, femora 

 at base equaling base of trochanters in diameter, inflated and obtusely 

 bent at basal third, longer than the two preceding joints; tibiae not 



