HEMIPTERA. 14! 



oaks wherever they grow. These insects are remarkable for the 

 wonderful gall-like form of the adult females. So striking is this 

 mblance, that they have been mistaken for galls^by many ento- 

 mologists. Fig. 126 represents a species of this genus upon Quercus 

 agri folia. The gall-like swellings on the stem are the adult females; 

 the smaller scales on the leaves are the immature males. 



Sub-Family II. LECANIN/E.* 



In the present state of our knowledge of this sub-family there is 

 nothing to add to the characterization of it given in the table on page 

 136. The most available character for recognizing these in-< *. : 

 the presence of the subtriangular anal plates (Fig. ui>. Usually, 

 the body is elliptical or circular in outline, vith a deep incision at 

 the caudal end, leading to the anal opening (Fig. 121). Although 

 rule these insects remain fixed to one spot after the wandering 

 larval stage, I have seen the adults of certain species move from one 

 place to another. It is a curious fact that in certain ^pecies. among 

 them the most common ones, as I.. //< >yV;-/V///w, the males are un- 

 known. It seems probable that they rarely, if ever, occur. Only 

 three genera have been found in the United State's. These are dis- 

 tinguished as follows : 



or nearly so. 

 B. Female secreting a mass of cottony material in which the eggs are laid. 



2. PULVINAKI \ 



B. Female laying her eggs beneath her body, not excreting a 



tmy material. I. LECANIUM. 



AA. Body covered with a layerof wax. 3. ( 'I-KOH \ 



ininw. The of the genus Lccanium abound every- 



tlu-y occur on all kinds of plants both in Conservatories and 

 in the open air. Some of them are known to garden. 



The genus is one that is racily reo>iMii/.ed, but no one has 

 'ly character*, for separating the i IOM-!\ allied 

 figured three of tl common t >i ins. 1 



V. I if of /.,,, //////;;/ //rsfSrif/uw. This is .1 represent .1! i\ up 



that includes our i :nm<n ; 



oval in outline, near! ul smooth and shin; 



/;////;;/ / I Mate V. . much more c<>: 



ndicates. I 1 :mioji in conservato: 



Lecanlnc, I I "). a dih 



IO 



