ISO iJuiy- 



35b.— DEGEERIA, Mgn. 



Gen. cJi. -Ej^es nude ; forehead slightly prominent ; facial angle 

 a little oblique ; frontalia narrow in the male, but moderately wide in 

 the female ; fronto-orbital bristles extending to about the root of the 

 arista ; facial setaj ascendiug half or more than half way up the 

 facialia ; antennae with the third joint from three to six times longer 

 than the second ; arista sometimes pubescent ; cheeks bare ; abdomen 

 usually with both discal and marginal setse ; wings with fourth vein 

 mostly bent in a curve, and outer cross vein placed midway between 

 the inner one and the bend of the fourth ; first posterior cell ending 

 near the tip of the wing. 



1 (8) Palpi black. 



2 (3) Thorax glistening white, in front of the transverse suture...!, collaris, Fin. 



3 (2) Thorax with the shoulders, or front margin only, white. 



4 (5) (6) Thorax marked with two black lines 2. blanda, Fin. 



5 (4) (6)Thorax unstriped 3. piilrhella, Mgn. 



fi (5)(4)Thorax with four distinct stripes 4. grandicorni/i, Zett. 



7 (6) Thorax with four short and almost confluent stripes 5. pygmcBa, Mcq. 



8 (1) Palpi pale 6. muscaria, Fin. 



D. COLLARIS, Eln. 

 ornata, Mgn. 



Frontal stripe black, rather wider than sides of frontalia, which, like the cheeks, 

 are glistening white, with dark reflections ; antennfe grey ; arista long, slender' 

 slightly pubescent, and thickened along its basal third ; facialia ciliated most of the 

 way up ; palpi black ; thorax shining black, clothed in front as far as the transverse 

 suture with snow-white pubescence, and marked on the anterior margin with four 

 short black lines, which are often pai'tly confluent ; in the female the hinder half 

 has a grey shine or reflection ; there are three post-sutural outer dorso-central setae ; 

 scutellum black ; halteres yellow ; abdomen oblongo-conical, bright black, with in- 

 ri8l1 fcerrupted white fasciae on the sides and front margins of the rings, which have also 

 Fuly, lS',i2. both discal and marginal setoe ; wings with apical cross vein nearly straight and 

 curved at the bend, outer cross vein straight, fifth vein sometimes abruptly shortened 

 a little before reaching the margin of the wing, when the specimen has been looked 

 upon as a distinct species from D. ornata, Mgn., in which the vein extends for its 

 full length ; legs black. Not common ; in the Rev. E. N. Bloomfield's, Mr. Dale's, 

 and Mr. Billups's collections. 



D. BLANDA, Fin. 



Eyes rather widely separated, frontal stripe black or brown, rather narrower 

 than the sides of frontalia, which are white with black reflections ; face and cheeks 

 silvery-white; antemin" long, third joint nearly six times as long as the second; 



