226 KANSAS UNIVERSITY QUARTERLY. 



Muscina varicolor, nov. ep. 



One male, Chapada, no date; one female, Rio de Janeiro, 

 July. Length, 6 to 7 mm. 



The ground color of the whole head, antennae and palpi is 

 pale brownish yellow in both sexes, except that the frontal vitta 

 of the female is black, and except, perhaps, the occiput and 

 geno-vertical plate, which are so thickly pollinose that I cannot 

 make out the ground color. The ground color of the whole 

 head is somewhat obscured by a pollinose coating, which is 

 silvery white on the facial fossa and geno-vertical plates and 

 inclines to bluish gray on the occiput and posterior orbit, espe- 

 cially in the female. 



The principal vibrissa is somewhat dorsad the free border of 

 the clypeus. On the vibrissal ridge dorsad the principal vi- 

 brissa there are a few tiny bristly hairs, not reaching more than 

 half way up the ridge. Ventrad the principal are two or three 

 secondary vibriss^e. 



The bucca and ventral portion of the occiput are quite uni- 

 formly, but not thickly, beset with black, bristly hairs, which 

 do not in either sex form a distinct row of larger bristles along 

 the lateral border of the mouth opening. As usual, the buccal 

 hairs are longer toward the occiput. 



The cilia of the posterior orbit form a complete and well- 

 aligned row in both sexes. They are rather longer in the fe- 

 male. The remainder of the occiput is remarkably free from 

 bristles. I can only see one row which begins dorsad, a short 

 distance ventrad the beginning of the cilia of the posterior orbit,, 

 and runs almost directly ventrad, as far as I can see. 



The dorso-ventral diameter of the head of the male is 2.1 

 mm. ; of the bucca, 0.3 mm. In the female these figures are 

 1.7 mm., 0.2 mm. The front of the male is very narrow on 

 about its middle two-fourths, the eyes being separated only by 

 the silvery line of the fused geno-vertical plates, and on this 

 narrow portion there are no transfrontal bristles. Ventrad the 

 narrow portion is the usual frontal triangle, which has a rich 

 brownish-red center (vitta) and silvery sides (geno-vertical 

 plates). Upon its sides are five pairs of transfrontal bristles, 

 one of which is very much larger than the others. All curve 

 cephalad and dorsad, with the convexity of the curve cephalad. 

 Dorsad the narrow part is a narrow vertical triangle, on whose 



