36 Proceedings of the Blologlcnl Societg of Washington. 
Allotype. —16-I);uia, Illinois, ]\hiy 27, hSDO (C. A. Hurt). 
I believe from the eoiulition of the specimens before me that the })re- 
apical Ijristle is normally absent from the hind femnr. 
Sapromyza tenuispina Loew. 
(Fig. 10.) 
Syn: Sapromyza tenuispina Loew, I)ii»t., Amer. Sept. Indig: Cent. T, 
1801, species 80. 
Male. —Differs from bispina Loew, as follows: 
Hind femnr with moderately long, irregnlar hairs on the entire length 
ol its postero-ventral surface, the antero-ventral surface with only very 
short hairs in addition to the preai)ical bristle; hind tilna without loose 
ventral hairs; abdomen much as in bispina but the last ventral segment 
shaped as in Fig. 10. In other respects similar to bispina. 
Female. Similar to the female of bispina except that it is rather more 
slender and the disc of the mesonotnni is not inclined to grayish or 
brownish and is distinctly shining. 
Itepresented in the material before me by one male and four females, 
Odin, Illinois, IMay 20, 1910, in a meadow (C. A. Hart); one female. 
White Heath, Illinois, May 18, 1889, in a wood (Marten). 
Although Loew states that the cross veins are not blackened I find that 
the specimens above mentioned are just as distinctly marked in this 
respect as those belonging to bispina. I believe, however, that there can 
be no mistake as to the identity of the above form with Loew’s species 
because of the very peculiar character of the ventral processes. 
Sapromyza aequalis sp. ik)v. 
d/afe.—Similar to tenuispina Loew, except that the anterior pair of 
dorso-centrals are weak; the ventral abdominal v>focess is rather shorter, 
and the hind femur has no hairs on the postero-dorsal surface, these being 
confined to tbe apical half of the antero-ventral surface, and very incon¬ 
spicuous. In all other respects very similar to th.e foregoing species. 
Length, 3.75 mm. 
7Vpc.—Algompiin, Illinois, August 8, 1895 (Nason). 
\Vith the type there is another specimen which may possibly represent 
another species. It has only three pairs of dorso-centrals, bnt owing to 
the fact that the anterior pair in the type arc considerably reduced in 
size, and that the second specimen is not in very good condition, I prefer 
to leave the specimen as possibly identical with the one from Algonquin. 
Locality of second specimeiq Urbana, Illinois, June 28, 1889(0. A. Hart). 
Sapromyza incerta sp. nov. 
This species is almost identical in color and general appearance with 
philadelphica dlacquart but may be separated from the latter by the fol¬ 
lowing characters; The mesonotum has oidy three pairs of strong dorso- 
centrals, and in front of the suture one very strong pair of bristles which 
may be mistaken foi the anteiior pair ot dorso-centrals, but which are 
