No. 2323. LARVAE OF THE CLERIDAE—BOYING AND CHAMPLAIN. 607 



whitish longitudinal mediodorsal line; ventrally lighter with the 

 whitish pattern more predominating than doi*sally; intersegmental 

 membranes whitish. Setae thin and long, light yellowish. Frons on 

 each side with a long, linear impression from near the lateral end of 

 clypeus and parallel with the middle line ; inside of this impression 

 and beginning near the center of frons a shorter, oblique, forward 

 directed line, and behind angulus frontalis a very shallow deep- 

 ening. Labrum more than twice as wide as long, only one-third as 

 long as frons. Mandible from apex to attachment of retractor tendon 

 about two-thirds the length of frons ; length to width as 2 to 1 ; reti- 

 naculum at the middle of inner margin ; tooth above retinaculum very 

 minute or absent; two mandibular setae. Chitinization of cardo 

 band-like, occupies less than half part of the entire surface of cardo. 

 Meso and metathoracic plates well developed. Basal plate of cerci 

 about same length as frons, somewhat wider than long, with four 

 parallel rows of linear dots.^ Cerci subcylindrical, subparallel, di- 

 rected slightly upwards, about half as long as basal plate, distance 

 between them about the same as their length, surface tuberculate; 

 apex slightly contracted, upright, somewhat recurved and slightly 

 turned inward. 



SECTION B (pp. 607-611). 



Body elongate digitiform with conical ninth abdominal segment, 

 or vermiform with semiglobular ninth abdominal segment; dor- 

 sally with ampullae; ventrally flattened, in one genus Neichnea 

 (p. 610), with protuberant sternellum. Chitinous parts moderately 

 or even poorly developed and colored. Membranous parts tinged 

 with pale bluish color or entirely whitish. Setae quite numerous on 

 the chitinous, scarce on the membranous parts. Headcapsule com- 

 paratively short; subtriangular, twice as wide as long, or subrectan- 

 gular not much wider than long; hypostoma slightly emarginate be- 

 tween the ventral articulation of mandible and the articulation of 

 the posterior end of cardo. Mandible about as long as wide; reti- 

 naculum at the middle of the inner margin. Maxilla with a nar- 

 row, band-like basal chitinization of cardo and stipes. Mentum and 

 submentum with very thin or without any chitinizations. Gula 

 longer than the maxilla from posterior end of cardo to tip of palpus. 

 Prothorax either subrectangular, about as long as frontal suture and 

 twice as wide as long, or transverse oval, slightly wider than long; 

 prothoracic shield delicately chitinized or absent ; prothoracic sternal 

 plate broadly pyriform. Meso- and metathorax without dorsal 

 plates. Basal plate of cerci either delicately chitinized, anteriorly 

 without sharp limitation and laterally rectilinear, or not developed. 

 Cerci moderately developed or small or absent. 



' In specimens not fully hardened the meso- and metathoracic dorsal plates are hardly 

 to be recognized and the basal plate of cerci is slightly chitinized and without distinct 

 marginal limitation. 



