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 O. §. 
1859 Teucholabis complera 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 LX XIX, 424). Sutures between segments indistinct. Body practically destitute of 
pubescence and setae. Spiracular disk (Plate LX XIX, 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 byfour 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 consistin 
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 (Plat 
LXXIX, 426) two-segmented, basal segment elongate-cylindrical, apical segment small 
ovate. Mandible (Plate LX XIX, 425) rather small, apical point inconspicuous, with abou 
three similar lateral teeth below it. Lobes of the maxilla blunt, stout, hairy, not extendin 
far beyond tip of mandible. 
Pupa.— Length, 6.5-6.6 mm. 
Width, d.-s., 1-1.1 mm. 
Depth, d.-y., 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 eye: 
