SYNOPSIS OF NORTH AMERICAN SYRPHID^. 31 



a polls jauntares ; quatrieme segment luisaut. Pieds uoirs ; base des 

 jambes et in^tatarse testaces. Ailes d'un jaune roussatre assez pale." 



" Philadelphie. Cette espece est interm6diaire entre les Psilotes et 

 les Pipizes." 



LEPROMYIA, NOM. NOV. 



Lepidomyia Loew (non Bigot), Ceutur., v, 38, 1864. 



Small, black, Dearly bare species, the thorax and borders of the ab- 

 domen with sparse squamuhe. Head like that of Chrysogaster, but 

 without facial or frontal wrinkles ; antennae elongate. Abdomen short, 

 broad. Anterior cross-vein of the wings near base of discal cell, third 

 vein nearly straight, last section of fourth vein sinuate, marginal cell 

 open. All the femora moderately thickened and with rows of sliort 

 spines below. Type of genus L. calopus Loew, West Indies. 

 Lepromyia calopus. 



Lipidomijia calopus Loew, Centur., v, 38. 



Eahitat.—Cnh&> (Lw.)! 



9 . Length, 5™°^. Black, thinly clothed with whitish tomentum. 

 Base of the tibioB and the first two joints of the tarsi white; wings spotted 

 with black. 



Black, rather bare, somewhat shining. Front plane, a little broader 

 below, with a median, subobsolete impressed line, and, on each side, 

 with two whitish pollinose spots. Antennae narrow, about equal in 

 length to the face ; first two joints reddish, tlie second one a little 

 longer than the first, and fuscous on its upper part ; third joint elongate, 

 black, the base below reddish ; arista basal, bare, fuscous. Thorax with 

 the scutellum and pleurae thinly but evenly clothed with minute whitish 

 squamulae. Abdomen plane, the sides and tip with white squamulae, 

 wanting on the disk. Legs black, shining, somewhat bluish ; base of 

 the tibiae and the first two joints of the tarsi white ; all the femora 

 thickened, armed below with a double series of small spines ; tibise sub- 

 clavate, the hind pair moderately arcuate. Wings hyaline, spotted with 

 black. 



Translation from the original, compared with the type specimen at 

 Cambridge. See, also, appendix. 



CHRYSOGASTER. 



Chrysogaster Meigen, lUiger's Magazine, ii, 274, 1803. 

 Orthoneura Macquart, Hist. Nat. Dipt., i, 563,1834. 

 Camptoncura Rontiani, Dipt. Ital. Prodr., ii, 1657. 

 Cryptinenra Bigot, Rev. et Magaz. de Zool., 1859. 



Small, metallic green or blue, or black species, wholly without yellow 

 markings, except on the legs, distinctly characterized from all other 

 genera by the front in the female having transverse lateral wrinkles. 



