310 Annals Entomological Society of America [Vol. VIII, 
direction. Abdomen more glossy than mesonotum and without distinct 
punctures, the surface hairs sparse and slightly longer than those of 
thorax. Legs slender. Third vein ending as far before apex of wing as 
its own length; distance from apex of stigma to apex of third vein 
slightly longer than the preceding section of costa; apex of discal cell 
very slightly proximad of apex of stigma (Fig. 6). 
Female.—Differs in color from the male only in having the halteres 
yellow. 
Structurally, the head differs from that of the male more than in 
other genera dealt with in this paper. The frons is broad, over one 
third the head-width, raised, with a central incised line which broadens 
above antenne, giving the frons the appearance of having a raised, 
rounded ridge on each side; postocular orbits prominent, visible from 
vertex to lower margin; cheeks distinct; eyes much smaller than in the 
male, facets of equal size throughout; profile as Figure 4. Thorax as in 
male, the scutellum with less noticeable rim. 
Length, 2.5-3 mm. 
Originally described from Saranac Inn, N. Y. Subsequently 
recorded by C. W. Johnson as having been reared from larvae 
found under the bark of pine logs at Auburndale, Mass., March 
26, 1905.* The imagines emerged between May 12 and June 20. 
Two specimens kindly submitted by Mr. Johnson bear the date 
of May 18, 1905. One of the specimens has the empty pupal 
skin attached to the pin, and is figured herewith (Figs. 9 and 10). 
Comparison of the pupa of this specimen with those figured 
by Verrall and here reproduced shows that while they are 
similar in general appearance, they may be separated by the 
disposition and length of the bristles. (See Figs. 11 and 12). 
I have a suspicion that this species may be synonymous 
with minutissima Zetterstedt, a European species which has 
been reared from larve found under bark of pine trees, but 
Verrall’s description} gives the eyes of the male as longer than 
deep, which is not the case with the specimens before me. 
I have no European examples for comparison, so leave the matter 
as it is for the present. It is pertinent to remark, however, that 
Verrall in his notes of the species indicates that the head of 
the only English male specimen he had seen is quite as deep as 
long—at variance with his description. Dr. D. Sharp has 
reared minutissimus from larve found under bark of Pinus 
sylvestris at Nethy Bridge, Scotland. The species is found 
in Scandinavia, France, Denmark, Austria and Germany, 
aa Vol. 18, 1906, p. 3. ‘ 
{British Flies, Sirdtampide’ Vol. 5, p. 67. 
