110 INSECUTOR INSCITI^ MENSTRUUS 



Wyeomyia fallax, new species. 



Female : Proboscis short, swollen at tip, clothed with dark 

 scales, some of these scales with light blue reflection, labellse 

 with fine outstanding setse. Palpi short, one-sixth of the length 

 of proboscis, clothed with dark scales with golden shine and 

 a few small hairs. Clypeus rounded, pruinose, nude. An- 

 tennae shorter than proboscis, brown, pilose, small hairs of 

 joints with silvery shine. Tori subspherical with a cup-shaped 

 apical excavation, grayish white. Eyes black, separated by a 

 narrow but distinct bare stripe of integument. Occiput clothed 

 with brown flat scales with dull blue luster, a white scaled 

 margin along the eyes joining a yellowish white patch on ver- 

 tex. Two stout hairs projecting between and a few smaller 

 ones along margins of eyes. A patch of white scales on under- 

 side of the head. 



Prothoracic lobes clothed with dark flat scales, tip white 

 scaled. Coarse dark bristles on front margin. Mesonotum 

 clothed with appressed elliptical dark scales with golden luster. 

 Dark hairs on front margin and over roots of wings. Scutel- 

 lum trilobate, coloration similar to that of mesonotum. Each 

 lobe with a few bristles. 



Postnotum dark brown, prominent, nude. Pleurse and coxae 

 clothed with flat white scales. 



Abdomen compressed, blunt at tip, dorsally clothed with 

 dark flat scales with bronzy luster. Venter clothed with yel- 

 lowish white scales, raised along the midventral line. Very 

 few hairs present. Colors separated in a straight line. 



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

 ginal cell one-third length of its cell, that of second posterior 

 cell more than one-half its cell. Basal cross-vein more than its 

 own length from anterior cross-vein. Outstanding scales 

 linear, slightly broader toward apex of wing. Halteres yellow 

 scaled with dark knobs. 



Legs dark with bronzy luster, femora brassy beneath, al- 

 most white at base, tibia; brassy beneath, midlegs with tip of 

 second and all of third and fourth joints silvery white on one 

 side. Fifth joint with a few white scales only. 



