946 CHARLES PAUL ALEXANDER 



Teucholabis is a rather extensive genus of small crane-flies (including 

 more than fifty described species) which find their center of distribution 

 in the Tropics of the New World. A few species occur in Africa and the 

 Oriental region. The genotype, Teucholabis complexa, is the only species 

 that has been reared (Johnson, 1900). Johnson's, material was kindly 

 sent to the writer for study, and furnishes the basis for the following 

 descriptions. 



Teucholabis complexa 0. S. 



1859 Teucholabis complexa O. S. Proc. Acad. Nat. Sci. Phila., p. 223. 



Larvae of Teucholabis complexa were found by Johnson in considerable 

 numbers beneath the bark of a decayed oak below Avalon, New Jersey, 

 on June 8, 1899. They commenced pupating about the 13th, the imagines 

 continuing to emerge from the 22d to the 27th. This gives a pupal 

 duration of not more than nine days. 



Larva. Length, 9 mm. 



Diameter, 0.55-0.6 mm. 



Coloration pale yellowish white, spiracles conspicuously darker. 



Form long and slender, body terete, tapering abruptly to the small prothoracic segment 

 (Plate LXXIX, 424). Sutures between segments indistinct. Body practically destitute of 

 pubescence and setae. Spiracular disk (Plate LXXIX, 427) with a broad, flattened, ventral 

 lobe, which is very bluntly rounded to subtruncate at apex, and two very short, blunt, lateral 

 lobes, at the base of which are the spiracles; spiracular disk without distinct markings. 

 Spiracles small; middle piece black, ring pale horn-color; spiracles .rather widely separated, 

 the distance between them about equal to the long diameter of one. Anal gills (Plate 

 LXXIX, 428) represented by four blunt, rounded lobes, which are apparently developed for 

 propulsion rather than for a respiratory function. 



Head not easily distinguishable in material available for study. Head capsule consisting 

 of four long, slender, rodlike plates, the internal lateral pair forked at about midlength, 

 so that capsule ends in six rods. Epipharynx with numerous small spines. Antenna (Plate 

 LXXIX, 426) two-segmented, basal segment elongate-cylindrical, apical segment small, 

 ovate. Mandible (Plate LXXIX, 425) rather small, apical point inconspicuous, with about 

 three similar lateral teeth below it. Lobes of the maxilla blunt, stout, hairy, not extending 

 far beyond tip of mandible. 



Pupa. Length, 6.5-6.6 mm. 



Width, d.-s., 1-1.1 mm. 

 Depth, d.-v., 1.2 mm. 



Coloration pale; head, thorax, and sheaths of appendages darker; eyes black. 

 Form slender, narrowed behind. Between antennal bases a prominent, two-parted crest, 

 each lobe somewhat truncated behind and bearing a single stout seta. Front above eyes 



