l|e Caitatliaii Jittomolagbt. 



Vol XXVIII. LONDON, APRIL, 1896. No. 4. 



A CONTRIBUTION TO THE KNOWLEDGE OF NORTH 

 AMERICAN SYRPHID.^:. 



BY W. D. HUNTER, ASS't IN ENTOMOLOGY, UNIV. OF NEBRASKA. 



[The material mentioned in this paper (with the exception of the type of Chilosia 

 Townsendi, n. sp., from the collection of the Cal. Acad, of .Sciences) is in either the 

 collection of the University of Nebraska or of Prof. C. W.Johnson, of Pliiladelphia. 

 In each case I have taken care to mention in which one of these the specimens may be 

 found.] 



Callicera Johtisoni, n. sp. 



Male. — Eyes contiguous for about two thirds their width above, 

 densely long, white pilose, with a sharply defined vertical black band 

 about one-fifth their width ; above, the two bands are confluent. Occiput 

 shining olivaceous, white pilose. Ocellar area with a tuft of ferrugineous 

 pile. Spot above the antennae bare, shining black. Face shining black, 

 except the tip of the indistinct tubercle, which is opaque ; covered, 

 except an indistinct median stripe, and more densely below, with abundant 

 long light yellowish pile ; very indistinctly concave below the antennae. 

 Cheeks shining olivaceous, except an anterior velvety cross-band and an 

 indistinct spot below the lowest margin of the eyes ; long yellow pilose. 

 Palpi clavate, testaceous at base, apical half black. Antenna; entirely 

 black, with short stiff black hairs on the first and second joints ; first 

 joint cylindrical ; second expanded at apex, less than half as long as the 

 first j third joint bare, over twice as long as the first and second together, 

 expanded on basal half, flattened, bent outwardly at middle. Style short, 

 obtuse. Thorax : dorsum shining olivaceous, with five opaque, very 

 indistinct, longitudinal bands; pile obscure yellowish, abundant. Pleura 

 shining, with more distinctly yellow pile. Wings a trifle tinged with 

 yellow anteriorly, veins testaceous. Anterior cross-vein distinctly before 

 the middle of the discal cell. Last section of the fourth vein with the 

 first third straight, distinctly sinuate inwardly. Tegulse white, ciliate. 

 Abdomen entirely covered with moderately long yellowish-white pile ; 

 first segment entirely opaque ; second, except a broad cross-band, 

 expanded medially into a large triangle, the apex of which reaches 



