The Crane-Flies of New York — Part II 863 



Abdominal segments (Plate XLIII, 198) each divided into two rings by a false constriction, 

 basal ring about two-thirds length of posterior ring. Basal ring on dorsum with a transverse 

 row of about eight slender, blunt tubercles before caudal margin; on pleura a similar but 

 larger tubercle opposite basal ring, this tipped with a long, delicate seta. Sternum unarmed. 

 Posterior ring on dorsum with a subterminal row of blunt tubercles, simple or bifid, often 

 approximated or crowded, bearing one or two long setae; near base of tergum, opposite 

 spiracle, a setiferous tubercle; on pleura, opposite base of posterior ring and nearer dorsum 

 than sternum, a vestigial spiracle with a double setiferous tubercle ventrad of it; near caudal 

 margin of pleura two or three compound multisetose tubercles (Plate XLIII, 197) or aggre- 

 gations of simple tubercles, which are largest on seventh segment. On sternum, two slender 

 tubercles on either side, near base of posterior ring. Female cauda (Plate XLIII, 201) 

 elongate, with the tergal valves a little longer than the sternal valves; each of tergal valves 

 with a small tubercle at base. Male cauda (Plate XLIII, 199 and 200) with the ventral 

 lobes blunt, the dorsal lobes a little longer and ending in an acute point; a tiny tubercle 

 on either side at base of dorsal lobes. Dorsum of segment 8 with a trapezoid of four con- 

 spicuous lobes ending in truncated tubercles; anterior pair of lobes smaller and a little more 

 widely separated than posterior pair. 



Nepionotype. — Ithaca, New York. 



Neanotype. — Ithaca, New York, May 31, 1917. No. 57-1917. 



Paraiypes.— F\ipa.l skins, June 11, 1917 (No. 99-1917), June 16, 1917 (No. 1.32-1917). 

 Abundant larvae, with nepionotype. 



(Subgenus Lasiomastix Osten Sacken) 



1859 Lasiomastix 0. S. Proc. Acad. Nat. Sci. Phila., p. 233. 



Larva. — Body slender, with pencils of stiff setae on lateral margins of thorax. Spiracular 

 disk with four lobes, the ventral pair a little the longer and bearing a fringe of long, delicate 

 hairs, these about twice length of lobes. Anal gills short and stout. Head capsule of 

 hexatomine type. Mandible powerful, cutting edge with a single row of three or four 

 flattened, bladelike teeth. Maxilla very long and slender. Antenna elongate, at tip with 

 a small elongate-oval papilla whose surface is delicately sculptured. IMentum chitinized, 

 a strong transverse bar which is ribbed with fine parallel grooves. 



Pupa: — CephaUc crest very small, inconspicuous, bilobed. Pronotal breathing horns 

 short, broad, somewhat compressed, a little pointed at apex. Mesonotum unarmed. 

 Abdominal segments depressed, armed with numerous tubercles or small spines, these being 

 most abundant on posterior annuli of segments. 



The subgenus Lasiomastix includes but six known species, three of 

 which are from eastern North America. Limnophila {Lasiomastix) 

 macrocera is common and widely distributed thruout the Eastern States. 

 L. (L.) tenuicornis 0. S. and L. (L.) subtenuicornis (Alex.) are found only 

 in the Northeastern States and are more local in their distribution. The 

 immature stages of L. (L.) macrocera are spent in rich organic mud. They 

 are very similar to those of the subgenus Phylidorea. 



