REVISION OF THE OECOPHORIDAE — CLARKE 75 



slender, bent just before middle, apex pointed, upturned. Transtilla 

 a narrow, weakly sclerotized band with well-developed, hairy lateral 

 lobes. Gnathos an oval spined knob. Socii broad flaps, weakly sclero- 

 tized and with few hairs. 



Female genitalia. — Ostial opening very large, occupying over half 

 t]ie length of the genital plate ; genital plate broad ; anterior margin 

 with semicircular cleft, the anterior points of which are widely 

 separated. Ductus bursae long, gradually broadening into the large 

 bursa copulatrix ; at posterior end of ductus bursae an elongate, lightly 

 sclerotized patch. Signum a large, strongly sclerotized, diamond- 

 shaped plate with the anterior and posterior points of the diamond 

 curled. The plate is armed with short stout teeth. 



Alar expanse, 22-24 mm. 



Types. — In the Museum of Comparative Zoology, Cambridge, Mass. 

 {eupatoriiella) ; in the United States National Museum (No. 11943) 

 {phmimerella) . 



Type localities. — "Kentucky" {eup at or Hell a) ; Plunnners Island, 

 Md. (Busck) ; Cincinnati, Ohio (Dr. A. F. Braun) {phmwierelkf) . 



Food plant. — Eupatorium. 



Distrihutioii. — Eastern United States probably as far north as New 

 England. 



United States records 



Illinois: Putnam County, 9 (14-IV-1939, M. O. Glenn). 



Maryland: Plummers Island, 10 $ S , Q 9 9 (March to August dates, 1905-1908, 



A. Busck and H. S. Barber). 

 Ohio: Athens, 3 $$,2 $9 (ll-XI-39, 29^1-40, 10-11-40, R. C. Barnes); 



Noble County, $, 9 (ia-IX-39, 31-XII-40, R. C. Barnes). 

 Pennsylvania: Pittsburgh, $, 9 (4-IV-06, lS-XI-06, Henry Engel). 



Remarks. — This species is apparently very close to scahella Zeller, 

 but since I have no authentic material of the latter species, I carniot 

 be sure of the genitalia. I quote, in part, a letter from Mr. Stringer 

 of the British Museum, to Mr. Busck concerning plummerella and 

 scdbella.) which was written before I had an opportunity to examine 

 eupatoriiella : 



"I have carefully compared plwnmerella with our type of scdbella 

 Z., and have no doubt that they are distinct. The labial palpi of 

 scdbella have the Deprcssaria "furrow" on second joint but much more 

 compact and the terminal joint is shorter, not so pointed or recurved 

 as in your species and nebvlosa Z. ; in color markings there is no 

 difference. In size and color of fore wings your species is nearer to 

 nehulosa; scaheUa is a smaller species with mucli narrower fore wing 

 and is brown-gray, not salt and pepper ; it is also devoid of any mark- 

 ings on the underside of either wing as in jjlummereUa and almost all 

 of the species of the genus." 



