216 Ml*. E. E. Austen on neio 



mm., (?) 5 to 5-75 ram. ; width of front of ? at vertex 

 0-75 to 1 mm. ; length of proboscis, {^) 8-75 to 12 mm., 

 (?) 7-3 to 8-75 mm. ; length of wing ISG to 15-6 mm. 



Dusky, dark-ivinged species, ivith first tivo segments of 

 abdomen taivny, remainder blackish brown loith lighter hind 

 borders ; median area of third segment often more or less 

 tawny ; posterior angles of second, fourth, and fifth segments 

 clothed with silvery-white hair ; an second segment silvery 

 hair forms continaous band on hind margin, broadening out on 

 each side of middle line ; wings uniformly brownish, first 

 posterior cell closed before reaching margin, fourth posterior 

 cell open ; hind legs and front and middle femora chestnut, 

 tips of front and middle tarsi brown, basal joints and front 

 and middle tibia ochraceous buff. 



Head yellowish pollinose, a brown or brownish patch on 

 middle of front in ? ; face moderately prominent, with a 

 shining black somewhat triangular callus on each side, in ^ 

 extending to front margin of buccal cavity ; ? with a 

 shining reddish-brown, elongate, quadrate, median callus 

 between and immediately above bases of antennae, and a 

 shining dark brown ocellar spot ; sides of face below tubercles 

 brownish ; in ? terminal and most prominent portion of 

 face bi'own, or, when denuded, shining dark brown ; anterior 

 portion of lower margin of jowls dark brown; under side of 

 head clothed with yellowish- white hair ; jjalpi ferruginous ; 

 antennee orange-rufous, first and seco-nd joints pollinose, in 

 S upper side of first and upper and under sides of second 

 joint bearing long black hairs, which in ? are confined to 

 upper side of second joint. Thorax : dorsum dark brown, 

 yellowish pollinose, and clothed with short yellowish pile, 

 which is intermixed with blackish hairs; lateral margins 

 edged with longer pale yellowish hair, forming a fringe on 

 each side, which includes the postalar callus ; the usual 

 longitudinal markings on dorsum, as also the transverse 

 suture, rendered somewhat more distinct by denser pollen, 

 especially in ? ; pleurse clothed with yellowish pile, a tuft of 

 black or blackish-brown hair on mesopleura, below and a little 

 in front of base of wing. Abdomen : first segment with a 

 blackish median area, wholly or partly concealed by scutel- 

 lum ; near this dark blotch clothed Mith blackish hair, else- 

 where with shining cadmium-yellow pile, especially con- 

 spicuous on posterior angles and hind margin ; second and 

 following segments, except where clothed Avith silvery-white 

 pile as indicated in diagnosis above, covered with short 

 black hair; in (^ , second segment usually with a small 



