E. T. CRESSON, JR. 77 



Limnia combinata variety sparsa Loew (PL I, fig. 5.) 

 1862. Tetanocera sparsa Loew, Mon. Dipt. N. A., i, 117. 



This is apparently but a variety of combinata. It is dis- 

 tinguished from that form by the less intensive wing design, 

 with the interspaces hyaline, not yellowish. All the fuscous spots 

 and bars are narrow, with broad quadrate clear spacings. The 

 bars are seldom paired and are generally completely extending 

 across the cells; the median streak in the cells is not very distinct. 



The specimens before me are smaller than the general run of 

 combinata (4 to 5 mm.). 



Originally described from the "Middle States." 



Specimens Examined. — 4 cf, 3 9. 



Maine: Capens, July 21; Machias, July 15; (all C. W. Johnson), [all 

 B. S. N. H.]. 



New Hampshire: Bretton Woods, June 24, (C. W. Johnson), [B. S. N. H.]. 



New York: Ithaca, August, [Cornell]. 



Limnia costalis Loew (PI. I, fig. 16.) 



1862. Tetanocera costalis Loew, Mon. Dipt. N. A., i, 118. 



cf, 9. A very distinct and easily recognized species. Similar to com- 

 binata but paler. Scutellum pale yellow, not darkened on disk, contrasting 

 noticeably with the mesonotum; the latter not so very distinctly striped; 

 praescutellur bristles absent. Second antennal joint broader than long, 

 noticeably shorter than third. Marginal cell with rounded, fuscous spots, 

 which are generally attenuated towards costa, or the costal margin may be 

 broadly infuscated, thus reducing the size of the clear spots. The clear 

 spaces of the wing assume a rounded form, not quadrate, and the median 

 streak in the submarginal and especially the first posterior cell is, at most, 

 almost obliterated, the fuscous spots becoming narrowly pointed bars along 

 the costa veins. Posterior cross-vein straight and perpendicular. Abdomen 

 at most with indistinct fuscous stripe. 



Originally described from Illinois. 

 Specimens Examined. — 2 cf , 3 9. 



New York: Ithaca, August 8, (J. M. Stedman), [Cornell]. 

 Maryland: Plummer's Island, June to September, (W. L. McAtee), 

 Biol. Surv.]. 



Limnia pubescens Day 



1881. Tetanocera pubescens Day, Can. Ent., xiii, 86. 



This form I have, for some time, considered a variety of sara- 

 togensis. It is, however, larger (8 mm.), with distinctly hori- 

 zontal eyes; second antennal joint very large, broad and longer 

 than the third, with five or six long bristles above near the apex. 



TRANS. AM. ENT. SOC, XLVI. 



