Tut CRANE-Fiies or New York — Part II 893 
Pronotal breathing horns (Plate LVII, 294) short, stout, cylindrical, apex expanded into a 
flattened circular head, stem coarsely and transversely wrinkled, base enlarged; breathing 
horns widely separated at their bases, but bent proximad so as to be almost contiguous at their 
tips; two strong setae laterad of base of breathing horn and an additional one in front of it. 
Mesonotum transversely wrinkled, with a distinct carina anteriorly (Plate LVIII, 296). Two 
groups of two setae on either side of median line, with an additional solitary seta; two longer 
setae above wing axil. Wing sheaths ending before tip of second abdominal segment. Leg 
sheaths ending at from two-thirds length to opposite end of third abdominal segment; tarsal 
sheaths ending about on a level, or, in some specimens, the hind tarsi a little longer than the 
others (Plate LVIII, 297). 
Abdomen indistinctly divided into a narrow basal ring and a broader posterior ring; basal 
ring further very indistinctly subdivided into two subequal annuli. Abdominal armature 
weak; on sternites a subterminal transverse row of delicate spines with two setiferous tubercles 
at each end! of row; on posterior ring two setae on either side at about midlength; tergites 
with four groups of two or three setae near posterior margin and an additional group of two 
setae on lateral margin of posterior ring near base; pleural region with a stiff seta on extreme 
anterior part of basal ring. Spiracles distinct; a group of two setae caudad and slightly 
ventrad of each spiracle, with an additional solitary seta caudo-ventrad of these. Female 
cauda (Plate LVIII, 298) with tergal valves of ovipositor only a little longer than sternal 
valves, at tip ending in a short, rather blunt point directed dorsad; on outer face before tip 
a short, stiff seta; segment 8 on dorsum with a close trapezoid of four irregular lobes; two 
setiferous tubercles on dorsal and lateral part of eighth segment, the more dorsal of these 
with two setae, the lateral one with a single seta; sternum with four stout setae, of which two 
are lateral and two are median in position. Male cauda (Plate LVII, 295, and Plate 
LVIII, 299) with sternal valves short and blunt; tergal valves slender, ending in an acute 
point directed dorsad; a few short setae on outer face before tip. 
Nepionotype.— Ithac., New York, Myy 25, 1917. 
Neanotype.— Bool’s hillside, Ithac., June 5, 1917. 
Paratypes.— Abundant larvae and a few pupae with types. 
Subtribe Polymeraria 
Genus Polymera Wiedemann (Gr. many + part) 
1821 Polymera Wied. Dipt. Exot., vol. 1, p. 40. 
Polymera is a tropical American genus including fifteen described 
species, one of which, Polymera georgiae Alex., occurs in the southeastern 
United States. A single additional species, P. magnifica Meunier (1906: 
385), has been described from the Baltic amber (Lower Oligocene). The 
only species concerning the ecology of which we have any record is P. 
geniculata Alex., which has been found living in crabholes beneath rocks 
in Porto Rico. In this connection the long-horned deinoceritine mosquitoes 
