1913] North American Dipterous Genus Neurigona 33 



Redescribed from eight males and one female, three of the 

 males are from Prof. Aldrich's collection, two were taken at 

 Battle Creek, Mich., and one at National Park, N. J.; this last 

 was taken by Mr. V. A. E. Daecke; two males were in Mr. 

 Nathan Banks' material, and were taken by him at Glencarlyn, 

 •Va. ; and three were sent me by Prof. C. W. Johnson, and are 

 from Buttonwoods, R. I., Hanover, N. H., and Cohasset, Mass.; 

 the female is in the American Entomological Society's collec- 

 tion and was taken at Manayunk, Pa. The one from New 

 Jersey was taken May 20th, the others were taken in June 

 and July. 



Note. — I have placed this single specimen as the female of 

 this species as it agrees in all the principal characters with 

 the male. 



5 Neurigona nitida n. sp. 



Figure 5. 



Thorax and abdomen yellow, the former shining black on the 

 dorsum, the latter with three wide black bands. Hypopygium black, 

 hairs and bristles of the front coxee whitish. Length, 4>^ mm. 



Male: Face very narrow, white; palpi white; proboscis yellow; 

 antennae yellow, arista brownish. Front and occiput black with white 

 pollen; frontal and post- vertical bristles black; orbital cilia white. 

 Mesonotum reddish-yellow along the lateral margins, black on most of 

 the disk and very shining, with a greenish reflection. Pleura; yellow 

 with white pollen, humeri more whitish; flattened space before the scu- 

 tellum with gray pollen, scutellum yellow with a black base. The 

 pleuras with a black spot in front of the halters, and another above the 

 hind coxae. Metanotum black, abdomen yellow with wide black bands 

 on the dorsum of segments two, three and four, that on the second near 

 the base and narrowed laterally, those at the base of the other two 

 about equal width throughout; fifth dorsal segment produced anteriorly 

 in a blunt, blackish point; the usual bilobed sheath on the venter black; 

 hairs of the first four segments black, those of the fifth pale. Hypo- 

 pygium not very large, shining black, basal part subquadrate, appen- 

 dages pale yellow. Front coxse with white hairs and bristles, middle 

 ones with black hairs ; front metatarsi as long as their tibi«, with a row 

 of long bristles on the bottom, continued on the next three joints; those 

 on the metatarsi a little longer than the diameter of that joint ; second 

 and third joints fuscous, fourth and fifth a little lighter; middle metatarsi 

 nearly as long as their tibi^; hind tarsi with the second joint longer 

 than the first; middle and hind tarsi infuscated from the base. Wings 

 hyaline, tinged with brownish, darker on the front; fourth vein bent 

 forward, ending not far from the tip of the third vein, and some dis- 

 tance front of the apex of the wing. 



Female: Differs from the male in having only the central line 

 between the acrostichal bristles and the fiattened space before the scu- 



