No. 2323. LARVAE OF THE CLERIDAE—BOVING AND CHAMPLAIN. 597 



C. f. CHAKACTERIZATIONS AND DESCRIPTIONS OF SUBFAMILIES, DIVISIONS, SECTIONS, 

 GENERA, AND SPECIES OF NORTH AMERICAN CLERIDS, ARRANGED ACCORDING TO THE 

 RELATIONSHIP OF THE LARVAE. 



Subfamily A (pp. 597-599 ).i 



Frons posteriorly limited by an acute angle. Epicranial suture not 

 present. Second antennal joint small, about the same length as 

 apical antennal joint. Ventral mouth parts distinctly exserted. 

 Gula with flat surface. Abdominal preeusternal and eusternal areas 

 vrell separated. Spiracles all well developed, all annuliform-bifore. 

 Ocelli, two on each side, 



1. Genus NECROBIA Latreille. 



Body subclaviforni, ventrally flattened, widest at fourth to seventh 

 abdominal segments, tapering from here gradually toward head and 

 the ninth segment, which is full and crescentiform. Membranous 

 parts variegated. Setae long, rather thin, numerous, scattered, 

 Headcapsule from middle of epistoma to end of frons as long as the 

 extreme width of the head ; sides nearly straight and parallel. Frons 

 with slightly unequal surface. Epicranium dorsally rugose, ventrally 

 smooth. Ocelli two on each side; the anterior more than twice as 

 large as the posterior; anterior ocellus not farthei* behind pleurostoma 

 than the length of second antennal joint; posterior ocellus placed 

 somewhat oblique)}" and dorsally behind the anterior one, as far from 

 this as the length of the same second antennal joint. Antenna with 

 lengths of basal, second, and apical joints proportioned as 3:2:1; 

 supplementary joints very small. Mandibles rather slender, consid- 

 erably longer than wide, apex long and pointed, projecting over inner 

 corner of mandibular base; distinct retinaculum. Maxilla well de- 

 veloped; both cardo and stipes with subrectangular basal chitiniza- 

 tion, the chitinization of cardo the larger; mala bidivided, fleshy, 

 reaching middle of second joint of maxillary palpus; palpiger with 

 low semicircular chitinization; joints of maxillary palpus gradually 

 decrease in thickness from basal to apical joint; lengths of basal, 

 well-developed square chitinization between and adjacent to the 

 chitinizations of cardines and as long as these. Mentum with curved 

 anteriorly concave chitinization and a transverse row of four setae. 

 Stipes labii chitinized; labial palp with basal and apical joints 

 shaped and proportioned as second and apical joints of the maxillary 

 palp. Gula nearly as long as frons, its length, in proportion to the 



1 It is not deemed advisable to consider as a family, corresponding to the adult family 

 Corynetidae the present subfamily A, represented by the genus Necrobia. Every cue of 

 the other five subfamilies, established in the present paper, should in that case logically 

 be raised to family rank. 



