34 Proceedings of the Biologicud Societi/ of Washington. 
Sapromyza seticauda s]). iiov. 
( Figs. 8, 12, and 18.) 
Male. —Yellow; head i)arts opaque, thorax and ahdoinen snhopaqne, 
the former lightly gray dn.sted. Wing.'^ clear, veins yellow. All hristles 
1 )lac8v. 
Frontal hi'istles strong, mn'inal in nnmher, oc(‘llar n'gion with 2-'I 
pairs of short setnlae in addition to the ocellar hristles; arista yellow at 
hase, brownish beyond, distinctly haired, the longest hairs are ahont 
e.qnal in length to one-third the breadth of third antennal joint; profile 
of head very similar to that of inaequalls (Fig. Ki) hnt the cheeks are 
not as strongly haiivd. .Afesonotnm strongly haired, 4 ])airs of strong 
dorso-centrals present; 2 rows of acrostii4ials, which are very clo.ce ])lac.ed 
serially and increa.se rapidly in strength from in front; besides the acros- 
tichal rows there are .'^everal irregnlarly arranged hairs between the dorso- 
centrals and tlui acrostichals; ])lenrae with the normal hristles; disc of 
scutellmn hare, aj)ical hristles cruciate. Abdomen ecjnal in length to 
thorax; ha.se broad, gradually tapei'ing from middle, lateral view as in 
Fig. !), the 7th segment very conspicuously setulo.^e laterally; the ventral 
organs are exposed in the type', as ilrawn, lent this is not the normal con¬ 
dition of the hy])opygium, those (organs generally lying close up against 
the ventral surface so tlnit it is imjeossihle to discover their true foi'in 
without re'laxing the sieecimeu. Legs rather strongly bristled, hut tlu' 
hristles occupying only the usual area, i. e. the jmste'ro-dorsal and postc'ro- 
vcjitral surfaces of foi'c lemur, the anterior surface, apical half, of mid 
femur, and the .single preapical antero-ventral bristle on hind femur; all 
tibiae with })rcaj)ical bristle; postei’o-veutral .surface of hind femur with 
scattered, rather long, weak hairs, the most conspicuous one being neai’ 
apex, hind tibia with a .series of long hairs on l)a.sal third. Wing as 
shown in Fig. 12. Jx'ngth, .‘>.5 mm. 
7//pe. —Havana, Illinois, July 14, IhlO. 
Female .—Similar to the jnale in size and coloration. Dill'eringin shape, 
etc., of abdomen, which is broad at ha.'^e and tapers very much poste¬ 
riorly, (ith segment short; apices of all segments with black hristles. Legs 
with the same hristles as in the male, hnt the .soft hairs are absent from 
both the hind femur and hind tibia. The thoracic chaetotaxy is similar 
to that of tlie male. 
.l//oh/pe.—Same data as type. Tyi)e and allotyi)e in Illinois State La¬ 
boratory of Natural History. 
Sapromyza bispina Loew. 
( Fig. 11 .) 
Syn: Sapromgza hispina Loew, Dij)!. Amer. Sept., Indig; Cent., 1, 18(11, 
species 71). 
This s])ecies dili'ersfrom tlu' foregoing in hi'ingmuch more slender; the 
abdomen is distinctly longer than the thorax; the hypopyginm is very 
large and knoh-like, and there is no (conspicuous grouj) of setnlae as in 
seticauda; tlu' hind femur has soft hairs on the antero-ventral surface 
