E. T. CRESSON, JR. 75 



cell quadrate and regular, while in the submarginal and first posterior cells 

 they are rounded and arranged regularly in two series, each along the veins. 

 Length, 4 to 5 mm. 



Type. — cf ; North Fork of Swannanoa River, Black Mountains, 

 North Carolina, May, (W. Beutenmiiller), [A. N. S. P., Type no. 

 6223]. Parotype. — 1 d^, topotypical. 



Specimens Examined. — 2 cf,4 9- 



Maine: Capens, July 21, (C. W. Johnson), [B. S. N. H.]. 



New Hampshire: Bretton Woods, June 25; Mount Washington, 2500 ft. 

 alt., July 2-4; Half-Way House, Mt. Washington, July 6, (all C. W. Johnson), 

 [all B. S. N. H.]. 



North Carolina: North Fork of Swannanoa River, Black Mountains, 

 (W. Beutenmijller), [Johnson]. 



LIMNIA Desvoidy 

 1830. Desvoidy, Myod., 684. 



In this genus the median frontal stripe is broad, excavated 

 and polished; the lunule retracted but distinguishable between the 

 antennae; second joint robust, quadrate; third triangular, pointed; 

 arista white plumose, with rather short hairs. Mesopleura setu- 

 lose. Ocellar bristles present. The wing design consists of trans- 

 verse fuscous spots or bars between the veins and which are con- 

 nected by a more or less distinct longitudinal, fuscous stripe 

 running along the middle of the cells; the marginal cell is some- 

 times entirely infuscated. 



Genotype. — Limnia limbata Desvoidy [syn. Musca unguicornis 

 Scopoli (1763)], [present designation]. 



The following species are known to me from our fauna: 



Praescutellar bristles absent; scutellum uniformally yellow costalis 



Praescutellar bristles present. 



Scutellum uniformally yellow; marginal cell infuscated, with small round 



spots shannoni 



Scutellum with dark spot on disk. 



Marginal cell entirely, or broadly infuscated along costa; eyes horizontal. 

 Second antennal joint with at most three bristles above. 



saratogensis 



Second joint with at least five such bristles pubescens 



Marginal cell with separated infuscated spots; eyes round, .combinata 



Limnia combinata Loew (PI. I, fig. 9.) 



? 1830. Tetanocera bosci Desvoidy, Myod., 608. 



1859. Tetanocera combinata Loew, Wien. Ent. Monat., iii, 295. 



TRANS. AM. ent. SOC, XLVI. 



