The Crane-Flies of 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 WTinkled, 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. AVing sheaths ending before tip of second abdominal segment. Leg 

 sheat'is 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 Vjasal 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 lati'ral 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 S 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 v.'hich 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. 



Nepinnniype.— Ithaca, N-w York, May 25, 1917. 

 Neanoti/pe. — Bool's hillside, Ithici, June 5, 1917. 

 Paralypes. — Abundant larvae and a few pupae with types. 



Subtribe Polymeraria 



Genus Polymera Wieck-mann (Gr. many + part) 

 1821 Polymera Wicd. Dipt. Exot., vol. 1, p. 40. 



Polymera is a tropical American g(^niis including fifteen described 

 species, one of which, Polymera ycoryiae Alex., occiu's in the southeastern 

 United States. A single additional species, P. magnijica Meunier (1906: 

 385), has been deso'il^ed from the Baltic amber (Lower Oligocene). The 

 only species concerning the ecology of which we have any record is P. 

 geniculata Alex., which has hxm found living in crabholes beneath rocks 

 in Porto Rico. In this connection the long-horned deinoceritine mosquitoes 



