1919] Ludlow — New Mosquitox from Panama 167 



lanceolate and forked scales on the vertex, and black forked scales 

 on the occiput; these, changing somewhat in shape extend well 

 toward the sides of the head; brown bristles extending forward 

 around the eyes; antennse brown, basal joint brown, second joint 

 with a few slender white scales, verticels brown, pubescence white; 

 proboscis very dark brown, labellse light brown; palpi dark covered 

 with very dark brown or black scales, outstanding on the proximal 

 third, the apical parts of the ultimate and penultimate joints 

 broadly snowy white, only a narrow brown band or spot inter- 

 vening, which may possibly very narrowly involve both sides of 

 the joint, a few yellowish hairs at the apex; clypeus brown, nude; 

 eyes black. 



Thorax: prothoracic lobes well separated, mamillated, with a 

 few brown bristles; mesonotum grey and brown, the median por- 

 tion of about one-third the width of the mesonotum is greyish, 

 and this widens so as to include the "bare" space, a median dark 

 brown line extending about half the length of the mesonotum and 

 laterally the membrane is a soft brown. The small hairs are diffuse 

 over the greyish portion, a line of larger hairs in the median dark 

 line, and at the junction of this grey with the brown lateral portions, 

 which latter is almost nude save for a few longer bristles on the 

 lateral margin and over the wing joint. There are a few narrowly 

 lanceolate white scales and a group of brown bristles at the nape; 

 scutellum brown with scanty brown hairs and brown marginal 

 bristles; postnotum brown, nude; pleura brown shading to the 

 white of the coxse. 



Abdomen brown covered only with brown hairs, and brown 

 border bristles. 



Legs brown; coxae very light, practically white, with a few brown 

 bristles, femora light at the very base and on the ventral aspect, 

 otherwise the scaling of all the legs is dark brown, with a minute 

 yellowish knee-spot on the hind legs. 



Wings clear, heavily clothed with dark brown rather broadly 

 lanceolate scales, tending to give golden reflections; fringe dark 

 except at the apices of both forks of the second long vein and the 

 apex of the third where the color is a yellow such as is given by the 

 reflections on other parts of the wings. First sub-marginal a little 

 longer and narrower than the second posterior, its stem about half 

 as long as the cell, and the stem of the second posterior nearly as 



