258 long's second expedition. 



Inhabits North-west Territory. 



Head pale yellowish ; hypostoma slightly impressed with a 

 black line, and another dilated black line descends [ 378 ] from 

 the black vertex and includes the superior portion of the tuber- 

 cle of the antennae ; mouth each side black ; antennae blackish- 

 piceous, basal joint and seta paler ; second joint decidedly longer 

 than the first ; eyes with two yellow bands of which the anterior 

 one is irregular; occiput black, with a cinereous orbital line ; 

 thorax with four yellow spots on the anterior margin ; an obso- 

 lete, yellowish, curved line above the wings terminating an- 

 teriorly in a transverse, whitish spot on each side of the centre ; 

 an angulated yellow line behind ; pleurae with two yellow spots 

 placed vertically ; scutel edged with yellow ; wings hyaline, a fus- 

 cous costal margin, ferruginous at base and gradually dilated to- 

 wards the tip ; poisers white ; feet white ; anterior pair with the 

 anterior half of the thighs and tibiae and all the tarsi black ; in- 

 termediate pair with the tip of the thighs, of the tibiae, and all the 

 tarsi pale rufous, posterior pair hairy beneath, with a tooth near 

 the tip and posterior half black; tarsi and tip of the tibiae pale 

 rufous, the latter arcuated ; tergum with a band near the base, 

 somewhat narrowest in its middle ; another narrower one on the 

 middle and two near the tip a little broader in their middles, 

 yellow; venter with about three distant, narrow, yellow bands, 

 of which the middle one is sometimes fulvous. 



Length less than three-fifths of an inch. 



This insect does not altogether agree with the characters of 

 the genus in which I have placed it, inasmuch as the hind thighs 

 are toothed, the hind tibiae arcuated, and the terminal joint of 

 the antennae is oval and not elongated. It disagrees with Milesia 

 in the elongated first and second joints of the antennae, and with 

 Pipiza in the length of the palpi, and but for the character nf 

 the antennae, I should certainly refer it to the genus Milesia. 



[Mac-quart has placed this insect as a new genus Mixtemyla. 

 — Sacken.] 



