34 INSECUTOR INSClTly^i MENSTRUUS , 



Culex (Culex) coronator Dyar & Knab. 



Culex coronator Dyar & Knab, Journ. N. Y. Ent. Soc, xiv, 215, 



1906. 

 Culex (Culex) usquatiis Dyar, Ins. Ins. Mens., vi, 122, 1918. 



Normal adults emerged from larvae in a street excavation 

 filled with rain-water, San Benito, Texas, August 21, 1930 

 (H. G. Dyar). The larvae were lost in transit and did not 

 come under minute observation. 



The male hypopygium agrees with the normal coronator 

 form, not as in the usquatus form, which has the setae at the 

 tip of the side-piece forming a distinct tuft. 



THREE NEW MOSQUITOES FROM COSTA RICA 



(Diptera, Culicidce) 

 By HARRISON G. DYAR 



Culex (Choeroporpa) alfaroi, new species. 



Occiput with flat black and white scales, which change in 

 color with the incidence of the light ; abdomen black above ; 

 legs black ; wing scales black, those on the forks of the second 

 vein outwardly narrowly ovate ; mesonotum dark brown, the 

 narrow curved scales inclining to golden. 



Hypopygium. The shape of side piece and clasper cannot 

 be made out in the mount. Outer division of lobe of side- 

 piece narrowly columnar, widened and rather strongly furcate, 

 the inner limb with a long hooked filament and a shorter simi- 

 lar filament with separate insertions ; close to the outer limb, 

 a large insertion bearing a rather large leaf, not quite as long 

 as the setae ; on the limb beyond, a group of about four fila- 

 ments closely placed. Inner division of the lobe of side piece 

 with two long hooked filaments, close together and parallel, 

 one inserted half way up on the side of the other. Mesosomal 

 plate trifid, the upper horn short and pointed, the lower longer 

 and notched ; third point subapical, close to the others, long 

 and sharp. Basal hooks broad, curved. Tenth sternites slen- 

 der with comb-shaped tip, the base expanded, with a shoulder, 



