WYEOMYIA CODIOCAMPA 103 



Legs rather long and slender, black with a bronzy and blue reflection, femora 

 whitish beneath ; all the tibiae and first joint of hind tarsi pale brassy beneath, 

 the other tarsals pale bronzy beneath ; mid tarsi with apical portion of second, 

 all of the third and fourth joints white on outer side; hind tarsi with second 

 and third joints silvery white beneath. Claw formula, 0.0-0.0-0.0, the hind 

 tarsi with one claw small. 



Length : Body about 4 mm. ; wing 4.3 mm. 



Male. — Proboscis more gradually enlarged at the tip than in the female, 

 the basal half silvery beneath. Palpi minute. Antennae a little more densely 

 haired than in the female, with a small secondary, whorl towards the apices of 

 the joints. Coloration similar to the female. Abdomen slightly enlarged at the 

 apex, with a dense tuft of terminal hairs divided into four groups. Wings 

 of same shape as in the female, the stems of the fork-cells a little longer. 

 Mid legs shorter than the anterior ones, their tarsi with last three joints curved 

 inwardly in an arc, the last joint with a single claw. Hind legs white beneath 

 on first three and base of fourth tarsal joints; mid legs with third except at 

 base and all of fourth tarsal joints white above. Claw formula, 0.0-0-0.0, 

 those of hind tarsals unequal. 



Length : Body about 4 mm. ; wing 3 mm. 



Genitalia (plate 3, fig. 10) : Side-pieces short, the, tip stoutly conical, some- 

 what excavated for insertion of clasp-filaments; three long setae in a row. 

 Clasp-filament with stout, short base, the tip expanded and divided into three 

 lobes ; outer lobe long and slender ; middle one broad,'> obliquely truncate, and 

 bearing a terminal row of long, fine setae; inner lobe' a short projection upon 

 the middle one, bearing a spine. Harpes rather long, slender, the tips obscurely 

 toothed, a long crest of dense, fine hairs arising from its tip. Harpagones 

 forming a basal cone, the unci a similar, smaller one. Basal appendages repre- 

 sented by three smaller, stout setae. Penultimate segment with a projecting 

 rounded lateral process bearing long hairs ; a second smaller process within. 



Larva (plate 88, fig. 380). — Head rounded, nearly circular in outline, the 

 posterior angles slight; antennae small, uniform, a single hair beyond the 

 middle ; dorsal head-hairs single and rather short, ante-antennal hairs in small 

 triple tufts. Abdomen with all the hair-tufts coarse and stellate, the lateral 

 hairs single, long. Air-tube moderate, about four times as long as wide, uni- 

 formly slightly tapered, the terminal hooks small; two single hairs on dorsal 

 aspect, ventrally one on basal fourth and one near tip. Lateral comb of eighth 

 segment on a large, irregularly elliptical plate, of six large, blunt-tipped teeth ; 

 ti3t behind multiple. Anal segment rather longer than wide, with a large 

 dorsal plate; dorsal tuft of four long hairs on each side; lateral tuft at angle of 

 plate of three long hairs; subventral tuft multiple, short. Anal gills rather 

 short, upper pair somewhat shorter than lower ones. 



Mr. Busck obtained the larvae in bamboo-joints which he had cut and pre- 

 pared. The species is probably addicted to tree-holes and similar locations. The 

 hair-tufts are greatly developed, giving the larva a peculiar appearance. Mr. 

 Busck says: 



" These were the most extraordinary-looking mosquito larvae which have come 

 under my observation, and resemble more young caterpillars than dipterous 

 larvae; they are short, fat, and rotund, and covered with many long, black 

 spines in closely set clusters. The movement of the body is therefore short and 

 slow, and they remain for long periods under water, quietly feeding in the 

 decomposed vegetable matter in the bottom." 



Panama. 



Tabernilla, Canal Zone, larvee in bamboo-joints. May 9, 1907; also adults 

 captured in bamboo woods (A. Busck). 



