INSECUTOR INSClTLli MENSTRUUS 109 



Body: length, 3.5 mm. ; wing, more than 3 mm, 



Male: Proboscis and palpi as in female. Antennae more 

 plumose than in female. Coloration similar to that of female. 

 Wings longer than abdomen, hyaline ; petiole of second mar- 

 ginal cell one-third the length of its cell, that of second poste- 

 rior cell two-thirds of its cell. 



Legs brown, underside distinctly brassy, front and mid legs 

 without contrasting colors, hind legs with the last two tarsal 

 joints silvery on one side, with slight interruption between 

 the joints. 



Claw formula : 0.0-0.0-0.0. 



Body : length, 3.5 mm. ; wing, over 3 mm. 



Genitalia : Side pieces twice as long as wide, two stout hairs, 

 bent inwardly, below the middle. Below these a row of five 

 long hairs. A small lobe present with minute hairs. Clasp 

 filament with lobes, the latter ornamented on margins with 

 spines and hairs. Harpes curved, ending in four teeth. Each 

 basal appendage with three stout hairs. 



Larva : Head rounded. Antennae small, smooth, a small 

 tuft outwardly. Lower pair of dorsal head hairs in threes, 

 upper pair multiple ; ante-antennal hairs multiple. Comb of 

 the eighth segment more than 20 spines in a single row, single 

 spine thorn-shaped. Anal segment not as long as wide. Anal 

 plate large, spicular. Subdorsal hairs in twos, lateral hair 

 single. Subventral tuft multiple. Anal gills long. Air-tube 

 smooth, conically tapered at apical half, somewhat widened at 

 the middle, covered with longitudinal rows of long single hairs, 

 basally a tuft of two or three. 



Larvae found in Bromeliaceae. Lawa River, March, 1917. 

 Surinam. 



This species is provisionally placed in the genus Wyeomyia, 

 although it has scales on the postnotum. It comes near to 

 Lutz's genus Menolepis on account of the patch of white 

 scales on the postnotum. According to Theobald's table 

 Menolepis has the wing scales linear. This species has them 

 broader. 



