No. 2323. LARVAE OF THE GLERIDAE—BOVING AND CHAMPLAIN. 621 



antennal joint. Gula with unpaired, large chitinous tubercle. Ab- 

 dominal preeusternal and eusternal areas not distinctly separated. 

 Spiracles very small, all bifore. Ocelli, five on each side. 



14. Genus THANEROCLERUS Lefebvre. 



Body elongate, digitiform; ninth abdominal segment well de- 

 veloped, semiglobose. Chitinous parts well developed. Membran- 

 ous parts unicolorous, with vivid color. Setae thin, rather numerous, 

 scattered. Head capsule subrectangular, longer than wide, dorsally 

 convex. Frons without distinct sculpture. Epicranium dorsally 

 without sculpture; ventrally, posterior to the gular tubercle with 

 deep, transverse, curved wrinkles; anterior margin of hypostoma 

 straight transversal. Ocelli five ; three in an anterior, upwards and 

 backwards oblique row behind lateral part of antennal ring, two 

 in a posterior row parallel with the anterior one; the lower pos- 

 terior ocellus on the level with the upper anterior ocellus. Length 

 of basal, second, and apical antennal joints proportioned as 1-|: 1: 1; 

 supplementary joint small. Mandible about half as long as frontal 

 suture; length to width about as 3:2, pointed, apex right above 

 inner corner of mandibular base, retinaculum small, at the middle 

 of inner margin of mandible; tooth above retinaculum low, rather 

 obtuse. Maxilla with a band-like chitinization at the base of cardo 

 and a comparatively large rectangular chitinization on stipes; length 

 of basal, second, and apical joints of maxillary palpus propor- 

 tioned about as 1 : 2 : 2 ; palpiger well developed with joint-like chiti- 

 nization. Gula well chitinized, as long as frons, about three times 

 as long as maxilla; unpaired tubercle large, placed centrally. Sub- 

 mentum and mentum somewhat chitinized. Stipes labii chitinized; 

 length of basal and apical joints of labial palp proportioned as 1:1. 

 Prothorax subrectangular, half as long as wide; twice as long and 

 somewhat narrower than the following thoracic segment, dorsal 

 shield well chitinized; sternal plate narrow, lanceolate. Meso- and 

 meta-thorax with conspicuous dorsal chitinizations. Hypopleural 

 chitinization for the support of the leg well developed. Legs of 

 moderate size, well chitinized. Abdomen with normally developed 

 intersegmental membranes ; ampullae slightly indicated. Basal plate 

 of cerci circular, flat, well chitinized, covers median half of the dorsal 

 surface of ninth abdominal segment. Cerci rudimentary in mature 

 forms, reduced to two granulif orm elevations ; in the previous stages 

 comparatively larger and more lobeshaped. 



The systematic position of this genus is very isolated. 



THANEROCLERUS GIRODI Chevrolat. 



Hunter U. S. No. 3459; mature. Species reared, imago preserved. 

 (Figs. 15, 29, 42, 62, 78, 100, 101, 113, 126.) 

 Total length of body, 9 mm. ; extreme width, about 2 mm. ; extreme 

 thickness. If mm.; anterior width of prothorax, IJ mm. Head 



