74 INSECUTOR INSCITI^ MENSTRUUS 



Air-tube straight, slender, not flared at base, some ten times 

 as long as wide ; pecten reaching one-third, the teeth moderate, 

 the outer ones somewhat longer ; five pairs of rather small hair- 

 tufts along the posterior margin, approximate, slightly dis- 

 located. Tracheae narrow and curving about in the tube. 



Closely allied in both genitalia and larva to educator Dyar & 

 Knab from Central America. It may be only a geographical 

 form of educator. 



Culex (Choeroporpa) educator Dyar & Knab. 



Culex educator Dyar & Knab, Journ. N. Y. Ent. Soc, xiv, 217, 



1906. 

 Culex elevator Howard, Dyar & Knab (in part), Mosq. N. & 



Cent. Am. & W. I., iii, 414, 1915. 

 Culex apateticus Howard, Dyar & Knab (in part), Mosq. No. 



& Cent. Am. & W. I., iii, 321, 1915. 

 Culex (Choeroporpa) educator Dyar, Ins. Ins. Mens., vi, 105, 



1918. 



The genitalia are as just described for vaxus, with the single 

 exception of the absence of the expanded filament adjacent to 

 the middle filament of the outer division of lobe of side-piece. 

 If present at all, it is minute and setaform. 



Described from Costa Rica, and apparently the commonest 

 Choeroporpa in Panama. 



Culex (Choeroporpa) bibulus, new species. 



Clasp-filament thick, but narrowly snout-shaped, the spine 

 appendiculate. Outer division of the lobe of the side-piece 

 columnar, with a short inner arm, bearing a long hooked fila- 

 ment and a short one ; middle filament blade-shaped, accom- 

 panied by a slender round-tipped filament ; outer group of 

 three filaments curved and blade-shaped. Inner division of 

 the lobe of side-piece with the arms well separated, the outer 

 long, the inner very short, each with a long filament with 

 expanded pointed tip. Second uncal plate furcate, the inner 

 limb denticulate, the outer smooth ; a very large curved horn, 

 arising from the stem just at the base of the furcation. Ar- 

 ticulated plate triangularly expanded, excavated at outer mar- 

 gin. Basal hooks long, strongly recurved, pointed. Basal ap- 



