INSECUTOR INSCITI^ MENSTRUUS 115 



Prosopolepis prolepidis Dyar & Knab. 



Wyeomyia prolepidis Dyar & Knab, Ins. Ins. Mens., vii, 1, 1919. 

 Prosopolepis prolepidis Dyar, Ins. Ins. Mens., vii, 142, 1919. 

 Prosopolepis prolepidis Dyar & Ludlow, The Military Surgeon, 

 xlviii, 677, 1921. 



The figure of the clasper is repeated from the last refer- 

 ence cited above, Plate II, figure 5. 



Culex (Helcoporpa) trifidus, new species. 



The definition of the subgenus Helcoporpa may be enlarged 

 to include the present form by reading "tip of clasper ob- 

 liquely elliptically excavate, or branched.'' 



Bronzy black, the abdomen with small basal segmental white 

 spots. 



Head with flat black scales on vertex, many forked brown 

 ones behind, and a narrow border of white ones along the eye- 

 margins. Mesonotum with fine hair-like dark brown scales. 

 Abdomen bronzy black above, with small segmental white 

 lateral spots ; venter dark gray, the segments very narrowly 

 white at their bases. Legs black, the femora white below 

 nearly to the tips ; coxae green. Wing-scales black, narrow, 

 those on the forks of the second vein narrowly ligulate. In 

 the male, the palpi exceed the proboscis by about the length 

 of the last joint, slender, pointed, the last two joints sparsely 

 hairy. 



Hypopygium. Side-piece short, subspherical and thick, the 

 end of the abdomen enlarged thereby ; lobe near the apex, the 

 outer division shortly notched, with a spatulate leaf, a long 

 hooked filament and a short one ; inner division with two 

 filaments with triangular pointed tips, one inserted more 

 basally than the other. Clasper thick, divided into three erect 

 parallel lobes, the center one shorter, the outer one bearing a 

 short appendiculate spine subapically. Tenth sternites comb- 

 shaped, the teeth at the tip divaricate, forming a hook. Meso- 

 some with two long slender straight plates ; basal hooks 

 curved; parameres normal, the articulated plate (basal plates?) 

 furcate. Ninth tergites elongated, foot-shaped, with a single 

 seta (Plate II, figure 6, side piece and basal parts). 



