>{o. 2323. LARVAE OF THE CLERIDAE—BOVING AND CHAMPLAIN. 605 



mandible; supplementary joint small. Mandible considerably 

 longer than wide: retinaculum well developed, closer to the end 

 than to the base of mandible: no tooth above retinaculum. Distal 

 half of ventral mouthparts more obliquely upward directed than 

 in any of the forms of genus 2. Maxilla very well developed; 

 length from condyle to end of palpus in proportion to gula as 4:5; 

 both stipes and cardo with a subrectangular chitinization, that of 

 cardo about twice as large as that of stipes and about three-fourths 

 of the whole cardo. Maxillary palpus with joints gradually de- 

 creasing in thickness towards apex; length of basal, second and 

 apical joints proportioned as 1^ : 1 : 1 ; chitinization of palpiger 

 semicircular. Submentum with well developed square chitinization 

 between, adjacent to and as long as the chitinizations of the cardines. 

 Mentum with small, transverse chitinization and four setae. Stipes 

 labii chitinized; labial palpus with basal and apical joints as long 

 and thick as second and apical joints of maxillary palpus. Pro- 

 thoracic shield along middle line somewhat shorter than frontal 

 suture: prothoracic sternal plate lanceolate. Legs of medium size. 

 Abdomen with normally developed intersegmental membranes; no 

 dorsal ampullae: scuto-scutellar suture entire, rather deep, with ante- 

 rior and posterior branches distinct, inferior branch indistinct; sec- 

 ond to eighth abdominal segments with well marked asperities on 

 each side along the end of scuto-scutellar suture and its anterior and 

 posterior oblique branches ; postscutellum normal. Spiracles pseudo- 

 annuliform. 



ENOCLERUS SPHEGEUS Fabricius. 



Hopk. U. S. No. 119o() ; uuiture. Species reared ; cast skiu and imago preserves. 

 (Figs. 4. 19. 32, 52, 69, 86, 104, 11.5, 116, 117, 119, 121.) 



Total length of body, about 20 mm. ; extreme width, about 3^ mm. ; 

 extreme thickness, about 3 mm. ; anterior width of prothorax, about 

 2 mm. Chitinous parts shiny; head brownish black, other corneous 

 parts somewhat lighter; delicately chitinized parts ])ale brown : mem- 

 branous parts lilac, where not exposed paler and more ])lnish gray. 

 Setae long and strong. Frons with median, low, broad, dagger-like 

 longitudinal elevation and on each side with an irregularly corru- 

 gated, inversely pear-shaped field. Epicranium dorsally rugose; sur- 

 face of epicranial protuberance smooth; sides with a few longitudi- 

 nal lines; ventrall}^ rugulose. Labrum more than twice as wide as 

 long, width as large as half the length of frons. Mandible from 

 apex to retractor tendon about three- fourths the length of frons: 

 length to width as 10:6; apex above inner angle of basis; retina- 

 culum closer to the end than to the basis of the mandible; margin 

 above retinaculum entire; mandibular setae two. Hypopharyngeal 

 plate laterally extending beyond the bicuspidate end of the vertical 

 arm from stipes. Prothoracic shield with length to width as 2:3. 



