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



Dermestinae 



Represented by the single genus Dermestes Linne. 



Body elongate, tapering anteriorly and posteriorly from metathorax ; dor- 

 sally deep reddish brown, with or without broad light line down back, strongly 

 sclerotized ; ventrally white, membranous except for 4 posterior abdominal seg- 

 ments which are nearly or completely sclerotized and pigmented; clothed with 

 short to very long spinulate setae, some of which are in 8 distinct, oblique series 

 across terga (fig. 3, /) ; most species in last larval stage with tergites 4 to 9, 

 sometimes 3 to 10, each bearing an anterior transverse series of retrorse tuber- 

 cles; ninth abdominal segment with a pair of urogomphi (fig. 2, H) ; tenth seg- 

 ment completely encircled by a pigmented sclerotized ring. Spiracles well de- 

 veloped, pigmented, and sclerotized; mesothoracic spiracle within membrane; 

 metathoracic spiracle greatly reduced, nonfunctional, indicated by small pig- 

 mented sclerite in membrane, abdominal spiracles in membrane or within re- 

 spective tergites. Legs unevenly pigmented. Head coriaceous, with fine slender 

 setae, lightly pigmented around ocelli ; 6 ocelli on each side ; f rons with or with- 

 out a pair of tubercles; antenna (fig. 2, K) long, sensory organ near middle of 

 second segment. Labrum with few setae. Epipharynx (fig. 4, A) with proximal 

 sensory area composed of a transverse, sometimes slightly irregular series of 6 

 large sensory papillae and a slightly more proximal transverse series of about 



9 to 11 sensory cups ; epipharyngeal rods tapering posteriorly, curved and diverg- 

 ing lateroposteriorly. Mandible (fig. 2, A) piceous, tridentate, with large retinac- 

 ulum and basal setal brush of long stiff setae; maxillary palpus (fig. 3, A) 

 4-segmented, segments snbequal ; palpiger well sclerotized ; ligula bilobed, setif- 

 erous ; gula and submentum fused. 



Boving and Craighead (1) and Lepesme and Paulian (7) illustrate 

 the sensory papillae and cups of the epipharynx as being distributed 

 without order. Robinson (11) illustrates these structures as being 

 in orderly transverse series but describes all the components as tiny 

 cuplike depressions, stating that they correspond in their structure 

 and location on the epipharynx to the taste cups described bv Pack- 

 ard (10). 



Attageninae 



Represented in North America by the genera Attagenus, Novelsis, 

 and Dearthrus. 



Body elongate, gradually tapering anteriorly and posteriorly from metathorax, 

 rounded dorsally, flattened ventrally, strongly sclerotized; sclerites golden to 

 fairly dark brown, venter lighter in color than dorsum ; generally densely cov- 

 ered with golden-brown to jet-black setae of various shapes (fig. 3, O and H), 

 a transverse series of similar but longer setae at posterior margin of each seg- 

 ment, the setae forming a loose bundle at lateral margin of each thoracic tergite ; 

 a small sclerite bearing several long, slender setae at lateroposterior angle of 

 each abdominal tergite ; setae of body for most part directed posteriorly ; ninth 

 segment with a long caudal brush (fig. 2, I and J) ; tenth segment small, white, 

 membranous, usually with 2 ventral oblong sclerites. Spiracles small, incon- 

 spicuous, at lateroposterior angles of tergites. Legs stout. Head densely cov- 

 ered with recumbent setae; antenna long (fig. 2, L), segments 1 and 2 very long, 

 3 short. Labrum dorsally with numerous long setae. Epipharynx (fig. 4, B) 

 with proximal sensory area composed of a transverse, sometimes slightly ir- 

 regular series of 6 large sensory papillae and a slightly more proximal transverse 

 series of about 17 to 20 sensory cups. Mandible (fig. 2, B) distally rounded, dis- 

 tal half piceous and distinctly narrower than yellowish-brown basal half, retinac- 

 ulum and basal setal brush present; maxillary palpus (fig. 3, B) 4-segmented, 

 first and second segments small, third curved inwardly and long, longer than 1 

 and 2 combined, fourth shorter than third ; segments of labial palpus subequal ; 

 ligula bilobed, setiferous; gula and submentum not fused. 



Boving and Craighead (1) do not illustrate or indicate the pres- 

 ence of the retinaculum or basal setal brush on the mandible of 



