HOW TO KNOW THE INSEQS 



25b Antennae inserted before the eyes; (a); tibiae with spurs (b); 

 first ventral not elongated. (The Powder-Post Beetles.) Fig. 113 



Family 93, BOSTRICHIOAE 



Fig. 113. Amphlcerus blcaudatus (Say) 



Dark brown, with scattered recumbent hairs. 

 Elytra coarsely punctured. Length 7-9 mm. 



The beetles of this family are dull colored 

 and cylindrical In form. They feed In dry 

 wood and often cause serious damage to lumber 

 and to buildings. 



26a Front coxae conical, profectlng prominently from coxal 



cavity 27 



26b Front coxae globular or transverse, usually projecting 



but little from coxal cavity 28 



27a Hind coxae dilated into plates partly covering base of 



femora. Antennae with large three segmented club at end. 



(The Skin Beetles) Fig. 1U. Family 64, DERMESTIDAE 



Figure 114. 



Fig. 114. Anthrenus scrophularlae (L.) 

 The Carpet Beetle. 



Ovate, convex. Black, thickly covered 

 with colored scales In black and white zig- 

 zag transverse rows. Interrupted by a 

 bright red sutural stripe, through middle 

 of back. This Insect has been Introduced 

 from Europe and the adults may be fre- 

 quently found In great abundance on the 

 flowers of Spiraea In early summer. Length 

 2.5-3.5 mm. (From U.S.D.A.) 



The Skin beetles do not constitute a 

 large family but are very destructive to 

 stored foods, furs, clothing, etc. They 

 are the most persistent pests of the Insect collection and every 

 unguarded collection Is sure to contain some living representa- 

 tives of this family even though no pinned ones are present. 



27b Hind coxae flat, not dilated into plates, fourth |oint of 

 tarsi equal to others. (The Checkered Beetles) Fig. 115. 



Family 29, CLERIDAE 



65 



