THE CRANE-FLIES OF NEW YORK PART II 989 



The writer found numerous larvae of Tanyptera frontalis in a fallen 

 log of red maple (Acer rubrum Linn.) near Beebe Lake, Ithaca, New 

 York, on March 22, 1913. Larvae of several sizes were found. They 

 were working in wood which was well preserved, not entirely sound but 

 still so hard that it had to be cut with a hatchet. The larvae pupated 

 in April. A small male emerged on May 1. 



Other larvae of Tanyptera were found in a hickory log (Carya sp.) 

 at Sandy Landing, Virginia (opposite Plummers Island), on September 

 9, 1913. Detailed drawings of the larval structure made by Dr. Boving 

 are in the collection of the United States National Museum. 



Larva. Length, 30-35 mm. 

 Diameter, 7-7.2 mm. 



Coloration, pale yellowish white. 



Form terete, very stout. Integument thin. Numerous long black setae on segments 

 (Plate LXXXVIII, 482), arranged in transverse rows before posterior margin; setae of 

 dorsum (Plate LXXXVIII, 481) very tiny, one on either side of median line; a pair of setae 

 laterad of these and in alinement; setae on pleural region very long and delicate; on thoracic 

 segments, setae at about midlength; on abdominal segments, setae closer to posterior 

 margin; mid- ventral setae very tiny, four in number, on thoracic segments at about mid- 

 length, forming a stiff pencil on sides of venter, with two small setae between; laterad of 

 these four intermediate setae, a group of three setae, two long and one very short; ventral setae 

 lying at a level posterior to that of pleural setae. Spiracular disk (Plate LXXXVIII, 

 483) with lobes practically lacking, the two large, oval spiracles lying exposed on trun- 

 cated end of last segment; above and laterad of each spiracle, a small, blunt lobe with a 

 blackened mark and three long setae; below spiracles, two narrow black lines representing 

 the two ventral lobes; a small pencil of setae below each of these marks, and each mark 

 having a sensory bristle; three or four long setae on sides of spiracular disk. Spiracles with 

 small middle piece black, ring yellowish brown; spiracles separated by a distance a little 

 greater than diameter of one. Anal gills four, bluntly rounded, very protuberant ,and 

 evidently formed for propulsion. (In older specimens the anal gills are minutely roughened 

 and are darker in color.) 



Head capsule of the massive tipuline type. Labrum rather broad; median epipharyngeal 

 region with a small brush of hairs surrounding two sensory setae; lateral lobes large, on their 

 ventral face densely hairy, surrounding four sensory setae and a flattened hyaline peg. 

 Mentum (Plate LXXXVIII, 478) rather small, broadly rounded, anterior margin with 

 seven or nine teeth, in the latter case the outermost tooth on either side very blunt and 

 reduced, the median tooth long and flattened. Antenna (Plate LXXXVIII, 479) short- 

 cylindrical; apical papilla very small, hyaline, conical, with surface sculptured; in addition 

 to this cone, three or four small hyaline sense pegs; the usual auditory organ located at 

 about midlength of segment. Mandible (Plate LXXXVIII, 480) small, with one dorsal and 

 one ventral tooth in addition to the apical point, ventral tooth flattened and with margin 

 crenulated; a stout seta at heel of mandible; prostheca an elongated cone, situated at base 



