12 MISC. PUBLICATION 511, U. S. DEPT. OF AGRICULTURE 



typically 4. Epipharynx (fig. 5, C) with distal sensory papillae in 1 or more, 

 usually 2, sharply defined, compact groups near distal margin of epipharynx; 

 a median pair of sensory cups ; a proximal transverse series of about 8 sensory 

 cups ; epipharyngeal rods fairly broad, anterior two-thirds straight and parallel, 

 posterior third abruptly tapering and diverging lateroposteriorly. Mandible 

 distally rounded, with a fairly sharp tooth on each inner cutting edge ; retinac- 

 ulum present. 



Genus Labrocerus Sharp 

 (L. simplex Sharp) 



Hastisetal tufts on segments 7 and 8, prominent, long, dense, directed pos- 

 teriorly. Frons with a single medioanterior tubercle. Antenna short. Middle 

 setal series of labro-epipharyngeal margin (fig. 5, D) with slender setae only, 

 sometimes lacking. Epipharynx (fig. 5, D) with distal papillae in 1 or more, 

 usually 2 or 3, sharply defined, compact groups near distal margin of epi- 

 pharynx ; a median pair of sensory cups ; a proximal transverse series of about 

 16 sensory cups; epipharyngeal rods broad, anterior two-thirds straight and 

 parallel, posterior third abruptly tapering and diverging lateroposteriorly. 

 Mandible distally rounded, with a sharp tooth on each inner cutting edge; 

 retinaculum present. 



ANTHRENINI 



Body oval, compact, not constricted, greatest width at abdominal segments 

 2 to 5; terminal abdominal segments appearing somewhat telescoped, sides of 

 body abruptly converging posteriorly from fifth abdominal segment; pronotum 

 normal, short. 



Genus Anthrenus Fabricius 



Hastisetal tufts on segments 5 to 7, prominent, long, dense, directed pos- 

 teriorly; corresponding tergites curved anterolaterally about bases of tufts. 

 Antenna (fig. 2, Q and R) long, second segment 2V 2 to 5 times as long as first. 

 Middle setal series of labro-epipharyngeal margin (fig. 5, E) with broad and 

 slender setae, typically 2 broad inner, and 2 slender outer setae. Epipharynx 

 (fig. 5, E) with distal sensory papillae loosely grouped in a faintly defined, trans- 

 verse, fusiform area near middle of epipharynx, papillae medium to minute in 

 size, distinctly and widely separated ; a medium pair of sensory cups ; a proximal 

 transverse series of about 8 to 12 sensory cups ; epipharyngeal rods fairly broad 

 to slender, slightly curved and diverging lateroposteriorly. Mandible distally 

 rounded, inner cutting edges rounded; with or without retinaculum. 



CTESIINI, new tribe 



Body compact, suboblong, constricted at abdominal segments 1 to 3, greatest 

 width of abdomen equal to or subequal to greatest width through thorax; 

 pronotum long, about equal to the combined lengths of the mesonotum and 

 metanotum. 



Genus Ctesias Stephens 

 (C. serra (F.)) 



Body suboblong, compact, width of fourth abdominal segment equal to, 

 or subequal to, greatest width of thorax, abdominal segments 1 to 3 short, 

 narrow, forming constriction of body ; length of pronotum about equal to com- 

 bined lengths of mesonotum and metanotum. Tergites strongly sclerotized and 

 pigmented ; abdominal segments ventrally with small, well-sclerotized, pig- 

 mented, rectangular sclerites. Hastisetal tufts 4 to 7, prominent, long, dense, 

 directed posteriorly, corresponding tergites curved anterolaterally about bases 

 of tufts, third segment with shorter, less dense tufts, tufts progressively larger 

 and denser posteriorly. Antenna (fig. 2, S) long, second segment about 3 

 times as long as first. Middle setal series of labro-epipharyngeal margin (fig. 

 5, F) with broad and slender setae, typically 2 broad inner and 2 slender outer 

 setae. Epipharynx (fig. 5, F) with distal papillae in 2 longitudinal series of 3 

 papillae each near distal margin of epipharynx, papillae large, distinctly and 



