378 S. W. WilUston — North American (Jonopidoi. 



broad pleural stripe, distinctly limited and not narrowed above, 

 upper border of disk of metanotum, extending broadly on the sides, 

 whitish pollinose. Abdomen red, the first, fourth, and fifth segments 

 blackish above ; the four anterior segments rather broadly bordered 

 posteriorly with golden or grayish yellow pollen, and nearly the 

 whole upper surface of the fifth and sixth segments thickly dusted 

 with the same. Legs red ; basal half of the tibiae yellow, coxae 

 and outer distal part of the four front tibiae with silvery luster ; tarsi 

 black, the metatarsi somewhat reddish. Wings brown in front, 

 hyaline behind ; costal cell, sub-hyaline ; first basal cell, and the 

 discal cell, except a brown streak in front of the fifth vein, hyaline. 



Hab. Arizona ! 



One specimen, from Professor Conistock. 



Conops fronto, n. sp. 



5 9. Lengtli, 11^ — 13'"'". Face, cheeks, and front uniformly 

 lio-ht yellow, a minute spot, immediately above the base of the 

 antennae, black ; face with a silvery luster, extending narrowly along 

 the orbits of the front. Antennae blackish, with a reddish cast, the 

 first joint yellowish red ; first joint about two-fifths the length of the 

 second, the third very distinctly shorter than the second; attenuated 

 portion of the style short, the second joint considerably projecting. 

 Eyes with a noticeable triangular smooth space behind, above the 

 middle. Occiput reddish yellow, the upper part and the vertex more 

 obviously reddish ; pollen light yellow, varying in different reflec- 

 tions. Proboscis about once and a half the lengtli of the head, 

 black, with a deep reddish cast, base swollen. Thorax light red ; 

 dorsiim with a white reflection in certain lights, with three broad, 

 more or less coalescent, black stripes, the middle one abbreviated 

 posteriorly, the lateral ones both in front and behind ; disk of the 

 metanotum and the metasterna, black, dust of the humeri and the 

 vertical stripe of the pleuraj indistinct; dust of the metathorax 

 behind light grayish yellowish. Abdomen slender in both sexes ; 

 red the disks of the third and fourth segments more or less black ; 

 posterior margin of the second segment and the anterior part of the 

 third yellow; third segment with a narrow posterior band, fourth 

 with a broad one, evanescent, anteriorly, and the remainder of the 

 dorsum, thickly golden yellow pollinose; process of the fifth seg- 

 ment below in the female of moderate size. Legs red ; base of all 

 the tibiae yellow, tip of the hind tibiae and all the tarsi black, pul- 

 villi and the claws, except Iheir tip, light yellow ; eoxa' and outer 



