May, '05] ENTOMOLOGICAL NEWS. I39 



cross-band which begins broadly on the anterior lateral edge of the 

 segment and ends near the middle, where it is broadly interrupted by the 

 black of the segment, the two halves of the band slightly arcuate. On 

 the posterior angles of the segment are two oval reddish yellow spots ; 

 third segment black with a bright yellow cross-band, which is sometimes 

 sub-interrupted by a narrow black line. Posterior edge of the segment 

 crossed by a reddish yellow band ; fourth segment same as the third, 

 except that the posterior reddish yellow band forms the greater part of 

 the segment, is dilated in front in the middle and is covered with reddish 

 yellow pile. Venter : Anteriorly of alternate bands of black and yel- 

 low, posteriorly black. Legs : first two pairs of coxae and all of the 

 trochanters black, with black pile ; third coxae yellow with yellow 

 pile ; femora reddish yellow and black, the black with a slight greenish 

 reflection ; middle tibiae and tarsi and hind tibiae and tarsi wholly light 

 yellow ; front tibiae and tarsi black, the tibiae reddish yellow at the base ; 

 pulvilli yellow ; ungues yellow with black tips. 



Hab. — Arizona. 



In structure this species is very similar to Milesia omata 

 Macq, but may be readily distinguished by its smaller size, 

 darker color and the very different arrangement of the bands 

 on the thorax and abdomen and also by the black anterior 

 tibiae and tarsi which in M. omata are reddish yellow. 

 Milesia pulchra Will, from Guatemala is also very similar in 

 structure to M. omata, and it is thus evident that the genus 

 Milesia, as now known, forms a very homogeneous group. 



Five specimens of the species M. viida were collected by Dr. 

 F. H. Snow during his expedition to Oak Creek Canon, about 

 twenty miles south of Flagstaff, Arizona. Altitude 6,000 feet. 

 These specimens now form a part of the Entomological collec- 

 tions belonging to the University of Kansas. 



The following table will be of use in more readily separating 

 the species ot the genus Milesia : 



1. Anterior tarsi black, posterior ones yellow mida sp. nov. 



Anterior and posterior tarsi, either yellow or black 2. 



2. Anterior and posterior tarsi yellow omata. Macquart. 



Anterior and posterior tarsi black palcbra. Williston. 



The most abundant of the Diptera in Wyoming last summer 

 were the Asilidae, Bombyliidae and Tachinidae. The rarest 

 were the Syrphidae and the Conopidae. Only twenty-five 

 specimens of the latter family were taken all summer, and not 

 until the latter part of August were many Syrphidae observed. 



