140 THE STUDY OF INSECTS. 



They are very small insects, rarely measuring more than 

 one eighth of an inch in length. Their eggs are fastened to 

 leaves, and covered by a brown, sticky substance ; they 

 appear more like fungi than like the eggs of other insects 

 (Fig. 166). 



Family Acanthiid^ (Ac-an-thi'i-dae). 



The Bed-bug and the Flower-bugs. 



The Bed-bug, AcantJiia lectularia (A-can'thi-a lec-tu-la'- 



~^f^ ri-a), is a well-known pest over the greater part 



T ~^BHrv" °^ l ' lc wol ' ( '- It ' s reddish brown in color, 



i /fi W\ anc * rneasures when full-grown from one-sixth 



' W V' ' to one-fifth inch in length. The body is ovate 



Fig. i6j.~-Acan- . . J m 



tkia uctuiaria. in outline and is very flat (rig. 167). It is 

 wingless, or has very short and rudimentary wing-covers. 



The Bed-bug is a nocturnal insect, hiding by day in the 

 cracks of furniture and beneath various objects. Bed-bugs 

 are easily destroyed by wetting the cracks in which they 

 hide with corrosive sublimate dissolved in alcohol. This is 

 sold by druggists under the name of bed-bug poison. Py- 

 rethrum powder blown into the cracks will destroy these 

 insects, and, unlike corrosive sublimate, is not poisonous to 

 man. A closely allied species, A. hirundinis (hir-un-di'nis) 

 occurs in nests of the barn-swallow. 



There are certain small bugs that are closely allied to the 

 Bed-bug, but which have wing-covers that are almost always 

 fully developed. These are the Flower-bugs. 

 They are found in a great variety of situations, 

 often upon trees and flowers, sometimes under 

 bark or rubbish. They are predaceous. Figure 

 168 represents a wing-cover of one of these insects. 



Family CAPSID/E (Cap'si-dae). 

 The Leaf-bugs. 



This is the largest family of the Heteroptera: the 

 members of it live chiefly upon the leaves of plants, 



