INSECUTOR INSCITI.^ MENSTRUUS 21 



Trichopronomyia microannulata Theobald. 



The genitalia place this species in Culex factor Dyar and 

 Knali. The type is from British Guiana. In Surinam we 

 found specimens of Culex factor with a tuft of hairs on the 

 proboscis in the male. The adult of microannulata has two 

 submedian impressed bare lines and a bent line above the roots 

 of the wings, the four lines resembling the lyre of Acdes 

 argenteus. The abdomen with very faint traces of banding 

 dorsally, more distinct laterally. 



Culex janitor Theobald. 



The genitalia of the male type agree with Dyar's description 

 (Ins. Ins. Mens., vi, 94, 1918). 



Culex bilineatus Theobald. 



The mount of the male genitalia of the male type shows it to 

 be a true Culex. The basal lobe is undivided and has three 

 rods, a filament, a leaf and a filament. The second uncal plate 

 consists of three teeth as in declarator. The adults have a dis- 

 tinct thoracic ornamentation of dark bronzy brown and silvery 

 golden narrow curved scales. The silvery golden scales are 

 present on the anterior margin of the disk, continuing me- 

 dianly for a short distance, a spot on the margin before and 

 one at the root of the wing, and a spot more medianly between 

 them and around the antescutellar space. Also on the scutel- 

 lum. Two bare impressed lines on the mesonotum. Proboscis 

 unhanded. Head with golden brown narrow curved scales, 

 Ijlack erect ones and whitish scales on eye margins. Abdomen 

 with basal lateral spots, unhanded or faintly dorsally banded 

 in the femle, distinctly in the male. Legs faintly and nar- 

 rowly pale banded basally and apically on all the joints. It 

 may be an ornamented form of declarator. 



Culex virgultus Theobald. 



Two males from Rio. The mount of the genitalia of the 

 male type shows it to be a true Cidex. The lobe of the side 

 piece is as in declarator Dyar and Knab, also the equal plates. 

 The adult has faint pale rings on the hind legs. We consider 



