50 INSECUTOR INSCITI/C MENSTRUUS 



snout-shaped, pilose on the anterior dorsal margin ; a seta 

 below ; mesial groove curved over it ; spine appendiculate, 

 widened, subterminal, rather large. Outer division of the lobe 

 of side piece with a short inner arm, bearing a long stout 

 filament with hooked tip, and a short blade-like one; a large 

 ribbed leaf inserted on the stem towards the base and rather 

 on the inner side ; middle filament blade-like, close to the outer 

 group of widened filaments, which exceed the leaf. Inner 

 division of the lobe of side piece with the arms well separated, 

 the inner about half as long as the outer, each bearing a stout 

 sinuate filament with flattened pointed tip. Paramere curved 

 to a pointed tip, distinct, bearing the articulated plate toward 

 its base ; mesosomal plate with a point on one side, not emar- 

 ginate or furcate, the other angle widely rounded and finely 

 denticulate ; articulated plate elliptical, strongly emarginate at 

 the tip on one side ; basal hooks moderate, curled, broad. Tenth 

 sternites slender, with comb-shaped tip of about seven teeth ; 

 a small shoulder at base. Ninth tergites triangularly elliptical, 

 with broad base, obliquely directed, densely and rather shortly 

 setose. 



The structure is allied to Culex (Choeroporpa) holoneus 

 Dyar, but the reduction of the mesosomal plate has not pro- 

 ceeded so far as in that species. 



Types, five males and nine females; two males and four 

 females in the National Museum, No. 23943, U. S. Nat. Mus., 

 three males and five females in the Army Medical Museum; 

 Cativa, Canal Zone, Panama, October 19, 1920 (J. B. Strop- 

 shire). 



Date of publication, January 27, 1921. 



