THE CRANE-FLIES OF NEW YORK PART II 925 



what flattened, pale yellow; a stout seta just before base of each breathing horn. Mesonotum 

 precipitous; at crest (Plate LXX1, 380) on either side of median line, a heavily chitinized 

 flattened plate projecting dorsad; this plate, at its tip, forking into two lesser teeth, the 

 lateral one of these still further subdivided into two still smaller teeth (in one specimen 

 the left plate is divided dichotomously into four teeth, the inner primary tooth being further 

 subdivided) ; on shoulder laterad of these plates a slightly swollen plate which is parallelly 

 grooved; two spines on lateral angle of thorax above base of wing; mesonotum with a few 

 setae behind crest, as follows: an anterior solitary seta en either side of median line and close 

 to it, a solitary stout seta above wing axil, two groups of paired setae, one just dorsad of base 

 of wing and the other midway between this group and the anterior seta first described. Wing 

 sheaths rather short, ending opposite base of third abdominal segment. Leg sheaths rather 

 long for this genus, ending opposite midlength of fifth abdominal segment; fore tarsi a little 

 shorter than hind tarsi, middle tarsi very short, ending opposite or just beyond end of third 

 tarsal segment of fore legs. 



Abdominal segments near posterior margin with transverse rows of short black spineg 

 which are much smaller and more widely separated near ends of row; at intervals alona 

 row a few elongate setae; on pleura a similar area of eight to eleven spines with a single sets 

 in row; tubular lateral spiracles on segments 2 to 7. Chaetotaxy as follows: on pleura, just 

 above dorsal end of row, one seta, another solitary seta cephalad of spiracle on anterior 

 ring; on tergites, a solitary seta on posterior ring about opposite spiracle; on sternites, two 

 small setae on either side of median line of posterior ring. Female cauda (Plate LXXI, 382) 

 with tergal valves long and slender, almost straight but slightly upcurved near tips; on 

 dorsal lateral margin, just before tip, a prominent tooth directed laterad and slightly caudad; 

 about midlength of valves a somewhat similar blunt tubercle on either side near dorsal margin; 

 at base of eighth tergite a pentagon of five chitinized lobes, the anterior one rudimentary, 

 the four developed lobes ending in acute chitinized points and each bearing a subapical 

 seta; anterior pair of lobes more widely separated and bearing on lower side near base a 

 small, slender lobule. 



Nepionotype. Ithaca, New York, March 27, 1914. 



Neanotype. Ithaca, with type larva, April 9, 1914. No. 2-1914. 



Paratypes. With types. 



Ormosia innocens (O. S.) 



1869 Rhyphoiophus innocens 0. S. Mon. Dipt. N. Amer., part 4, p. 142. 



Ormosia innocens is a characteristic early spring species, the adult 



flies being found in late April and during May. On May 12, 1917, a 



few pupae in an advanced stage of development were sifted from organic 



mud from Bool's hillside, Ithaca, New York. One of these emerged as 



an adult on the following day. The associated crane-fly larvae that 



occurred with this species on the date named were as follows: Bittaco- 



morphella jonesi, Dicranomyia stulta, Limnophila adusta, L. fuscovaria, 



Ulomorpha pilosella, Penthoptera albitarsis, Rhaphidolabina flaveola, 



