28 THOMAS SAY FOUNDATION 



The synonymy of Parapliyto opaca rests upon 

 tlie authority of Professor Mario Bezzi, of Turin, 

 Italy, to whom North American specimens were sent 

 by the writer; he reported them to be identical with 

 Wohlfahrtia meigenii (letter, June, 191.5). 



Male. Front .330 of head (average of five, — 

 .319, .321, .326, .337, .349); parafrontals and para- 

 facials broad, silvery pollinose, glistening; frontal 

 stripe broad, its upper part glistening and hardly dis- 

 tinguishable from the paraf rontal ; frontal bristles not 

 diverging below, reaching the base of the second an- 

 tennal joint; transverse impression and middle of face 

 reddish ; antenuc^ red, third joint blackish apically, not 

 much longer than the second, and reaching more than 

 two-thirds of the way to the vibrissas, which are at the 

 oral margin; palpi yellow; bucca about four-fifths 

 the eyeheight. 



Thorax with thin gray pollen and three ill-de- 

 fined black stripes; chaetotaxy as in magnifwa (see 

 generic description) except in the following points: 

 ps dc 3, but room for another behind the suture ; 1 pair 

 prsc ; prs 1 ; posthum 1 or 2 ; sc with 1 pair subapical, 

 which as in viagnifica might be considered discal. 



Abdomen with three rows of shining black spots 

 on densely pollinose ground; the pollen extends only 

 to the edge, leaving the venter shining; first and sec- 

 ond segments with only lateral bristles; third and 

 fourth with an interrupted marginal row; fifth ster- 

 nite not divided, yellow, at the middle of the hind edge 

 a slight protuberance. 



Hypopygium black; first segment pollinose at 

 base, shining at apex, with a row of bristles near base ; 

 second segment shining, globose, not bristly. Forceps 

 black, nearly straight in profile ; from behind they are 

 well separated but not divergent; accessory plate 

 blackish, elongated, with a wide, bare, rounded free 

 end farther forward than usual, beside the penis: 

 posterior clasper yellow, very short and low, bent back 

 but the tip curved forward, ordinarily quite invisible ; 

 anterior clasper yellow, erect and curved forward, the 



