AET. 10 NORTH AMERICAN TACHIKTID FLIES WEBBER 15 



types as follows: 1 female, Cromwell, Conn., July 26, 1926 (G. M. 

 L. 12431 L4) ; 1 male. Deep Kiver, Conn., July 27, 1928 (G. M. L. 

 12431 N5) ; 4 males and 1 female. Westerly, E. I., June 26-July 13, 

 1922 (G. M. L. 12431 G6b) ; 1 male, Westerly, K. I., July 23,"l923 

 (G. M. L. 12431 HI) ; 1 male. Westerly, R. I., July 3, 1923 (G. M. L. 

 12431 Hla) ; 1 female, Alexandria, N. Y., July 26, 1926 (G. M. L. 

 12431 LI) ; 6 males and 2 females. New Brunswick, N. J., July 11- 

 16-18-18-20-24, 1925-July-3-3, 1925 (G. M. L. 11776 Kl) ; 2 males 

 and 1 female. Mystic, Conn., July 11-19-30, 1923 (G. M. L. 12431 

 Hlb) ; 1 male, Putnam, Conn., June 2, 1921 (G. M. L. 12431 F2b) ; i 

 male, Deep River, Conn., July 19, i928 (G. M. L. 12431 N5). Other 

 specimens from the same localities as the above number about twenty- 

 five. 



Type.— Male. Cat. No. 43048, U.S.N.M. 



4. ACHAETONEURA SAMIAE, new species 



Differs from frenchii, euchaetiae, and anisotae in that the front 

 has an irregular number of supernumerary bristles outside of the 

 frontal row which are equal to the latter in strength. This charac- 

 ter is more pronounced in the males. Fourth segment of abdomen 

 densely bristly. Posterior spiracles of puparimn in a depression 

 and situated on longitudinal axis. 



Front of male at vertex varying from 0.30 to 0.33, in female from 

 0.35 to 0.38 the head width ; at base of antennae, front of male 0.39 

 to 0.44, in female 0.46 to 0.47 the head width ; buccal -width varying 

 from one-eighth to one-fifth the eye height; third joint of antennae 

 in male from four to five and in female from three and one-half to 

 four times the second. Front in both sexes projecting beyond eye 

 from one-fourth to nearly eye width, usually more so in female (head 

 held in profile, measurement taken at base of antennae). Front 

 pulvilli of male nearly equal in length to the last two tarsal joints. 

 Hind cross vein sinuate, distance from its end to small cross vein 

 varying from a little over once to twice its length, distance from end 

 of hind cross vein to angle of fourth vein equal to or considerably 

 less than its length. Apical cell open. 



Front and face wholly cinereous or with slight yellowish cast, fa- 

 cial depression cinereous, often appearing soiled, deep, its width 

 about three times that of one parafacial at narrowest part, which is 

 at this point wider than the third antennal joint. Occiput swollen 

 below. Antennae of male black, sometimes a little reddish at base, 

 more so in female. Bristles of the facial ridges irregularly placed, 

 often appearing as a double row. Frontal bristles variable in 

 strength, number, and uniformity of alignment. Sides of front with 

 a number of bristles equal in size to those of the frontal row. Oc- 



