NO. 2344. SVPERFAMILY TIPVLOIDEA— ALEXANDER AND McATEE. 419 

 ERIOPTERA NEEDHAMI Alexander. 



Plummers Island, August 9, 1915, at light, E. C. Shannon ; Little 

 Falls, District of Columbia, August 22, 1915, McAtee; Pimmit Kun, 

 Virginia, September 6, 1908, F. Knab; Eastern Branch near Ben- 

 nings. District of Columbia, August 29, 1915 ; Oxon Run, Maryland, 

 September 6, 1915, McAtee. 



* ERIOPTERA NOCTIVAGANS Alexander. 



Maywood, Virginia, October 19, 1915, at light, McAtee. 



* ERIOPTERA PARVA Osten Sacken. 



Fairly common; season July 25 to September 23; comes to light. 

 V. P. I. 



* ERIOPTERA SEPTEMTRIONIS Osten Sacken. 



Common: collected from July 14 to October 19; often attracted 

 to light. P. I. 



ERIOPTERA STRAMINEA Osten Sacken. 



Plimimers Island, July 9, 1902, H. S. Barber; Maryland near 

 Plummers Island, June 5, 1903, W. V. Warner. 



ERIOPTERA VENUSTA Osten Sacken. 



Common; has been collected from May 13 to October 4; comes 

 to light. V. P. I. 



* ERIOPTERA VESPERTINA Osten Sacken. 



Difficult Run, Virginia, July 25, 1915, Alexander and McAtee; 

 Washington, District of Columbia, September 23, 1906; Hyattsville, 

 Maryland, August 2, 1908, F. Knab. 



Genus MOLOPHILUS Curtis. 



KEY TO SPECIES. 



1. Size very small ; wiug about 2.5 mru. ; basal deflection of R 2+3 short, per- 



pendicular, about as long as the radial cross vein; basal deflection of Cui 



far before the fork of M M. ursinus (p. 420). 



Size larger, wing over 2.6 mm. ; basal deflection of R 2+3 longer, oblique ; 

 basal deflection of f?/i near the fork of M (in nova-caesariensis) or beyond 

 it on Ms 2. 



2. Wings with a brownish cloud on the basal deflection of Ma (Regional.) 



M. comatus (Doane). 

 Wings ^vithout such a brown spot 3. 



3. Antennae of the male elongated; coloration largely yellowish 



M. puMpennis (p. 420). 

 Antennae short in both sexes: coloration black or brown 4. 



