No. 2323. LARVAE OF THE CLERIDAE—BOVINO AND CHAMPLAIN. 599 



with a shallow deepening. Labrum three times as wide as long; 

 width about one-third the length of frons. Mandibles half as long 

 as frons ; length to width as 4:2; retinaculum and tooth same size, 

 are well developed and rather obtuse. Two short mandibular setae. 

 Prothoracic shield two-thirds as long as wide, with parallel sides. 

 Both meso- and metathorax are about as long as prothorax, surpass it 

 one-third or more in width; metathorax a trifle wider than meso- 

 thorax; meso- and metathoracic dorsal plates present, small and 

 about the same size. Basal plate of cerci a trifle wider than the pro- 

 thoracic shield, length to width as 2:3. Cerci one-third the length 

 of basal plate, upwards curved, diverging about 60°. 



Subfamily B (pp. 599-619). 



Frons posteriorly limited hy a sharp angle. Epicranial suture 

 not present. Second antennal joint small, about same length as 

 apical antennal joint. Ventral mouthparts exserted or slightly 

 retracted. Gula with flat surface. Abdominal preeusternal and 

 eusternal areas^ not separated. Spiracles pseudo-annuliform or 

 annuliform.^ Ocelli 5, 4, 3, 1, or none on each side. 



DIVISION 1 (pp. 599-612). 



Ocelli 5. 



SECTION A (pp. 599-607). 



Body digitiform with extreme width on fourth to seventh 

 abdominal segments, tapering from here gradually anteriorly and 

 posteriorly, ninth abdominal segment crescentif orm ; dorsally with- 

 out ampullae, except in one form, Galeruclerus ; ventrally flattened. 

 Chitinous parts numerous, well developed and with deep brown 

 color prevalent. Membranous parts strongly colored. Setae as a 

 rule rather numerous, scattered. Headcapsule comparatively large, 

 subrectangular, about as wide as long; hypostoma, between articu- 

 lations of mandible and cardo, straight. Mandible longer than 

 wide; retinaculum at or near middle of mandibular inner margin. 

 Maxilla usually with extensive chitinization of stipes and cardo. 

 Mentum and submentum usually with well developed chitinizations. 

 Gula longer than maxilla from end of cardo to end of palpus. Pro- 

 thorax subrectangular, as long as frontal suture, "not twice as wide 

 as long; prothoracic shield corneou5s; prothoracic sternal plate 

 lanceolate. Meso- and metathorax with dorsal plates. Basal plate 

 of cerci large, well chitinized; anteriorly well defined; laterally 

 rounded. Cerci well developed, well separated. 



1 In some species of the genus Enoclerus a separation is indicated between abdominal 

 preeusternal and eusternal areas. Also are the last abdominal spiracles here developed as 

 aonuliform-bifore. 



