262 U.S. NATIONAL MUSEUM BULLETIN 261 



diagonal rectilinear dorsopleural carinae. Forewing completely hya- 

 line, veins elevated, surface not punctate, without supernumerary veins 

 in clavus. Male with pygofer very strongly produced, posterior margin 

 rounded or truncate; plates slender and elongate, fused at their bases; 

 styles extending farther posteriorly than apex of connective, each 

 without preapical lobe and acute at tip; connective elongate and 

 slender, slightly expanded at each end, without a median keel ; aedeagus 

 very slender and elongate, curved gradually posterodorsally, shaft 

 bifid in more than apical half, without other processes; anal tube 

 without a ventral process or basal sclerites. Female abdominal sternum 

 VII as in A. izzardi, new species. Color of anterior dorsum black with 

 crown, anterior portion of pronotum, and all of scutellum maculate 

 with yellow, remainder of pronotum maculate with yellowish blue; 

 face yellow, margined with black dorsally. 



Holotype male, Rio Huallaga Valley, Huanuco, Peru, altitude 

 500 m., June 17, 1954 (F. L. Woytkowski), on indefinite loan to 

 USNM from NCS ; one topotypic female and one male, Tingo Maria, 

 Peru, August (NCS) ; one male, Monzon Valley, Peru, November 1 

 (CAS) ; and one male from San Antonio, Bolivia. 



P. terminalis, new species, is closely related to A. JIaveoloides, new 

 species, but difi'ers in its much more deeply bifurcate aedeagal shaft 

 and its lack of deep lobes on the male pygofer. 



Acrogonia flagellata, new species 

 Figure 258 



Length of male 9.5 mm. Head as in A. terminalis, new species, except 

 that clypeus is convex medially. Forewing coriaceous with a membrane 

 which includes all of apical cells. Male genitalia with pygofer strongly 

 produced posteriorly, posterior margin convex; male plates as in 

 A. terminalis but fused in basal half their length; aedeagus slender, 

 very elongate, biundulate, bifid in apical one-sixth; anal tube with a 

 basal sclerite which has a dorsal projection; other characters of male 

 as in A. terminalis. Female unknown. Crown dull yellow with lateral 

 margins black; pronotum with anterior and lateral margins concolor- 

 ous with crown, disc dull gray; scutellum concolorous with crown; 

 wings concolorous with disc of scutellum; face bright yellow, with a 

 very broad basal black band. 



Holotype male, labeled "Guyane/Kourou" on indefinite loan to 

 USNM from NCS. 



This species is very closely related to A. terminalis, new species, from 

 which it differs in the characters mentioned in the description. 



