912 CHARLES PauL ALEXANDER 
water in shaded woods. The pupal duration of the latter species is n 
more than ten days. Keilin (1913:4) notes the presence of hypoderm 
glands in larvae of M. bifilatus Verr., but does not mention the lary 
habitat. Of the American species, M. hirtipennis has been reared fro 
similar situations. 
Molophilus hirtipennis (O. 8.) 
1859 Erioptera hirtipennis O. 8. Proc. Acad. Nat. Sci. Phila., p. 228. 
The little dark-colored crane-flies of the species Molophilus hirtipenn 
are common on vegetation in shaded woods in spring and early summe 
or they may be found in small dancing swarms in similar situations. 
The larvae are exceedingly abundant in wet organic mud or in cool, ric 
woods in the neighborhood of streams or springs. The writer has reare 
the species very frequently from specimens found in Needham’s Gle 
and on Bool’s hillside, Ithaca, New York, in April and May, 1914 t 
1917. The pupal period is probably about a week, but in all the rearin 
of the writer this could not be ascertained closer than ten days. 
Larva.— Length, 9-10 mm. 
Diameter, 0.4-0.5 mm. 
Coloration light yellow. 
Form long and narrow; body terete, noticeably constricted before spiracular disk (Pla 
XLV, 344). Integument covered with a delicate appressed pubescence and a few transver 
rows of very short, erect setae. Spiracular disk (Plate LXV, 351) squarely truncated, su 
rounded by five subequal lobes; ventral lobes on inner face with two heavy black parall 
lines, separated by a capillary yellow line; lateral lobes with a similar double line runni 
inward far beyond spiracle; these double lines not connected at distal end; dorsal lobe wi 
a single oval black mark which is less intense outwardly; a black mark beginning at spirac 
running proximad toward center of disk; lobes with a few short hairs at tips. (There is 
little variation in the degree of intensity, but the general pattern is as described abov 
Anal gills four, short and blunt. 
Head capsule (Plate LXV, 345) long, narrow, consisting of six chitinized rods, the ventr 
rods broad and flat, at the anterior end expanded to form the mental plates (Plate LXV, 34 
each rod contributing four teeth, of which the outermost is bluntly rounded, the middle p 
the largest and subequal. Dorsal bars two on either side, one slender, at their anteri 
ends articulating with a transverse chitinized rod; the various bars connected by a th 
membranous tissue. Labrum and epipharynx elongate, narrow, occupying the space betwe 
mandible and antenna on either side, the ventral face with abundant long hairs, on sid 
margined with numerous long, incurved, flattened setae. Mental plates as described abov 
behind them the hypopharynx (Plate LXV, 347), consisting of a semicircular cushion provid 
with dense, short setae. Antennae (Plate LXV, 348) rather closely approximated on dorsu 
prominent, each 1-segmented but bearing a long apical papilla; basal segment moderate 
elongated, cylindrical, the apex obliquely truncated, the papilla hyaline, gradually narrow 
