The Crane-Flies of New York — Part I 903 



specialized forms the number of free segments beyond the fusion segment 

 is reduced to four or five, making a total of eleven or twelve segments. 

 The following key separates the local species of Chionca: 



1. Color of the body grayish. [Can. Ent., vol. 49, p. 205-206. 1917.] 



C. noveboracensis Alex. 

 Color of the body reddish yellow or yellow 2 



2. Form long and slender, length of male less than 4 mm., diameter across thorax about 



0.6 mm.; legs all very long and slender, not inerassated. [Can. Ent., vol. 49, p. 206. 



1917.] C. gracilis Alex. 



Form stouter, length of male over 4 mm., diameter across thorax over 1 mm.; male with 

 at least the posterior legs inerassated 3 



3. Antennae with 12 segments, there being 9 flagellar segments beyond the 1st, or fusion, 



segment; all the femora inerassated; size larger, length of male about 5.5 mm., diameter 



across thorax 1.5 mm. [Can. Ent., vol. 49, p. 204-205. 1917.] C. ■primitiva Alex. 



Antennae v/ith 7 segments, there being 4 flagellar segments beyond the 1st, or fusion, 

 segment; only the hind femora inerassated; size smaller, length of male about 5 mm., 

 diameter across thorax 1 mm. [Ins. Injur, to Veget., 3d ed., p. 601, fig. 260. 1841.] 



C. valga Harr. 

 (C. scila Walk, and C. aspera Walk, are probably synonymous with C. valga.) 



Genus Cladura Osten Sacken 



1859 Cladura O. S. Proc. Acad. Nat. Sci. Phila., p. 229. 



There are but two described species of Cladura, both occurring within 

 the limits considered in this paper. Cladura fuscula Loew (of Europe) 

 is Adelphomyia senilis (Hal.) ; C. flavescens Brun. (of India) is doubtfully 

 a member of this genus. It should be noted here that the antennae of 

 Cladura have the basal segments of the flagellum united into a fusion-seg- 

 ment so that the antenna seems to have less than sixteen segments. The 

 immature stages are quite unknown but are presumably spent in the soil. 



The two species of Cladura are separated by the following key: 



Large species, wing of female over 7 mm.; reddish yellow, the thoracic pleura spotted 

 with brown; wings yellowish, the cross-veins and deflections of veins clouded with brown; 

 Sc long, ending opposite the base of Ri, Sci being about opposite the fork of R2+3; r at 

 or beyond one-third the length of ^2; petiole of cell Mi short, not much longer than m. 

 [C. flavoferruginea O. S., Proc. Acad. Nat. Sci. Phila., pi. 4, fig. 34, 1859. C. indivisa 

 O. S., Proc. Acad. Nat. Sci. Phila., p. 291, 1861.] (Plate XXXVII, 102.) 



C. flavoferruginea O. S. 



Smaller species, wing of female under 6 mm.; pale yellow, no spots on the thoracic pleura; 

 wings hyaline without dark markings on the cross-veins and deflections of veins; Sc short, 

 ending about opposite midlength of R:-\-i, Sci being nearly opposite the fork of the sector; 

 r at about one-fourth the length of Rz; petiole of cell Mi long, about twice the length of m. 

 [Proc. Acad. Nat. Sci. Phila., p. 589-590, pi. 27, fig. 27. 1914.] (Plate XXXVII, 103.) 



C. delicntula Alex. 



These species are characteristic late summer and autumnal crane-flies, 

 very common in some localities thruout September and October. They 



