The Crane-Flies of New York — Part II 857 



Tho pupae of the group Limnophilae have the pronotal breathing horns 

 usually small, or at least not greatly elongated. The abdomen is often 

 greatly depressed, with the lateral margins flattened and carinate and 

 the segments incised. In the species of the subgenus Phylidorea the 

 segments of the abdomen are armed with rows of long, slender spines. 



The group Ulomorphae seems to be closely related to the other members 

 of the division, ])ut the immature stages present some curious conditions 

 which it is difficult to correlate with the same structures in the group 

 Limnophilae. The writer has removed a group of species from the old 

 genus Limnophila, and has placed these in the genus Pilaria Sintenis. 



In the larvae of the group Ulomorphae, the epipharynx and the maxillae 

 are densely hairy. The maxillary lobes are slender. The mandibles 

 are hinged at about midlcngth, the basal segment being concave on its 

 inner face to receive the mandibular blade when in a position of rest. 

 The mandibular blade has one, or sometimes two, elongate acute teeth 

 at the base. The mental region is not chitinized. The spiracular disk 

 is surrounded by four lobes, of which the lateral pair are often very 

 reduced; the inner faces of the lateral lobes are capable of close approxi- 

 mation, so that when they are closely applied the spiracles are contiguous. 

 The pupae have the pronotal breathing horns very elongate, with their 

 tips split into two flattened divergent lobes, as in Pseudolimnophila and 

 a few tipuline forms. 



The following keys separate the genera and the subgenera of the subtribe 



Limnophilaria: 



Larvae 



1. Mental region not chitinized; maxillae and epipharynx fringed with conspicuous, long, 



golden-yellow hairs; mandibles hinged; head capsule with dorsal plate spatulate at 



its tip. (Group Ulomorphae, p. 869J 2 



Mental region a narrow, transverse, chitinized bar, finely striate; maxillae and 

 epipharynx without conspicuous hairs; mandibles not hinged; head capsule not as 

 described above. (Group Limnophilae, p. 858) 3 



2. Length under 12 mm. ; basal tooth of mandibular blade nearly half the length of blade. 



Ulomorpha O. S. (p. 869) 



Length over 14 mm. ; basal tooth of mandibular blade about one-third or less the length 



of blade Pilaria Smt. (p. 872) 



3. Spiracular disk almost squarely truncated, surrounded by five subequal lobes producing 



an eriopterine appearance Dicranophragma O. S. (p. 861) 



Spiracular disk obliquely truncated, surrounded by two pairs of lobes of which the lateral 

 pair are the shorter 4 



4. Mandibles with two or three acute teeth at about midlength; epipharj-nx with a circular 



area bearing two biarticulate papillae Phylidorea Bigot (p. 866) 



Mandibles with three or four flattened and truncated teeth along blade; epipharynx 

 without papillae as above Lasiomaslix O. S. (p. 863) 



