118 BULLETIN 116, UNITED STATES NATIONAL MUSEUM. 



specimens there is a row of minute yellow hairs on lower inner edge. 

 Tibiae yellow; posterior pair black at tip for about one-sixth their 

 length ; still the inner side is yellow almost to their tips ; they are only 

 a little thicker than the others. Fore tarsi about equal to their tibiae 

 in length; infuscated from the ti]) of the first joint, which is about as 

 long as the remaining four taken together; last three joints of about 

 equal length. Middle tarsi a little longer than their tibiae, black 

 from the tip of the first joint. Hind tarsi wholly black. Calypters 

 and halteres yellow, the former with black cilia. 



Wings (fig. 73) grayish; costa a little enlarged at tip of first vein, 

 gradually tapering to its tip ; last section of fourth vein a little bent 

 just before its middle; last section of fifth vein nearly three tunes 

 as long as the cross vein; hind margin of wing scarcely indented at 

 tip of fifth vein; anal angle of wing not very prominent, rounded. 



Female. — Face wide, covered with whitish pollen; wings and feet 

 about as in the male; the middle tibiae have three large bristles on 

 lower anterior edge, their basitarsi without a bristle above. 



Redescribed from a type specimen and 2 males which I took, one 

 at Emsdale, Ontario, July 30, and the other at Scotia Junction, 

 Ontario, July 31; 3 males and 3 females from the White Mountain 

 region of New Hampshire, in the collection of J. M. Aldrich. 



The type specimen, in the American Museum, was taken by Doctor 

 Wheeler, in Price County, Wisconsin, Aug. 19, 1897. 



Four females which I took at East Aurora, New York, June 15, 

 seem to belong here, but they have tips of the hind tibiae black for 

 one-fourth their length; a male taken by J. M. Aldrich at Olympia, 

 Washington, I can not separate from the others. 



No. 74. DOLICHOPUS SINCERUS, var. SUBDIRECTUS, new variety. 



Male and female. — This form is so nearly like sincerus Melander 

 that it would answer that description very well; it differs, however, 

 in having the fore coxae more yellow at tips; costa scarcely at all 

 enlarged at tip of first vein (in sincerus it is only a little thickened) ; 

 the notch at tip of fifth vein is a little deeper; and the bend in the 

 last section of fourth vein is very small and perhaps more exactly in 

 its middle (fig. 74) . 



The nearly straight fourth vein is the only character which could 

 be depended on to separate the two forms as far as I can see. 



Described from 1 male and 2 females taken at Franconia, New 

 Hampshire; 1 female taken at Woods Hole, Massachusetts; and 1 

 female from Monmouth, Maine, July 14, by C. A. Frost. 



Holotype and allotype in the National Museum, taken at Woods 

 Hole, Massachusetts. 



Type.— M.Si\e, Cat. No. 23554, U.S.N.M. 



