Proceedings of the Bwlogiccd Societii of If ashington. 
oZ 
INIesonotum yellow in both sexes, very rarely with a slightly grayish 
or l)rownisli tinge in $ : cheek generally with microscopic hairs 
on margin; abdomen not, or slightly tapering, never keel-shaped 
in cJ*; in 9 the abdomen tapers gradually to apex of the 7tli 
segment, not suddenly constricted ; legs normal.2 
2. Hind tibia of d" with distinct, moderately long, solt hairs, on at 
least the basal third of the antero-ventral surface.M 
Hind tibia without such hairs.5 
3. Hind tibia ciliated on almost its entire length; prolongation of 
last ventral abdominal segment short ... cilifera, new species. 
Ciliation of hind tibia confined to basal half.4 
4. Last dorsal abdominal segment with numerous, black setulae, 
which form a noticeable group on lateral margin at apex ; pro¬ 
cess on last ventral segment short. seticauda, new species. 
Last dorsal segment without the. conspicuous group of setulae; 
ventral process long. bispina Lw. 
5. Male with the Oth dorsal segment of abdomen very much longer 
than 5th. inaequalis, new species. 
IMale with 5th and (ith abdominal segments subequal.6 
(i. Male with a row of moderately long hairs on the postero-ventral 
surface of hind femur; ventral abdominal process very long and 
slender. tenuispina Lw. 
No long hairs on postero-ventral surface of hind femur 
aequalis, new species. 
I have not included in the table the females of several of the species as 
I have but the male of aequalis, and the others present hut few characters 
that would permit of their tabulation. If the absence of the jn'eapical 
bristle from the hind femur is a constant character, as I believe it to be, 
in inaequalis it should he easy for one to recognize the female of this 
species, but the others are very closely allied and are very difficult to sepa¬ 
rate without the presence of males. 
Sapromyza harti sp. nov. 
(Figs. 3, 7, 8, and 14.) 
Suhopaque, yellow, thorax including pleurae, with a grayish or 
brownish tinge and distinct grayish pollinosity. Abdomen sometimes 
brownish dorsally. Legs entirely yellow. AVings clear, veins yellow, the 
outer cross vein slightly more distinct than the others. All parts of the 
head, except arista, yellow; arista brown. Halteres yellow. All bristles 
black. 
Frons slightly huccate, almost one-half the head width; all frontal 
bristles strong; post-vertical pair widely separated; about equal in length 
to the anterior orbital pair; profile of head as shown in Fig. 3; arista 
pubescent; cheeks bare. Mesonotum with 4 pairs of very strong dorsal- 
centrals, the anterior hardly weaker than the prescutellar pair; 2 rows 
of short but strong acrosticbals present, disc of scutellum bare; pleural 
bristles normal, very strong, the usual hairs very sparse and indistinct 
