LYGAEIDM 151 



blance to ants, and this is especially so in the case of the 

 species of Pilophorus, Coquilletia, and Sericophancs. 



One of these species, Coquilletia mimetica, carries this 

 resemblance to the extreme in the development of small 

 elevations on the first and second abdominal segments 

 which correspond closely to the first abdominal segment of 

 the ant. The female in one form is entirely wingless, biit a 

 full-winged form of female also occurs, and the males are 

 full-winged. ' 



Another species, Sericophanes ocellatns, shows somewhat 

 less modification in that the wings are not completely lost 



104. — Chinch bug (Bht,su^ hucopttnt^) . adult of loiiK-wiiiged form, 

 much enlarged. (From Web'iter, Div Ent., U. R. Dept.. Ag.) 



but are retained as short rudiments which extend over 

 the basal segments of the abdomen. The efl'ect as a whole, 

 however, closely simulates the appearance of an ant. 



The family Lygaeidse includes the chinch bug and numer- 

 ous other small bugs, but few of which are of economic 

 importance. 



Chinch Bug (Blissus I eucoptenis).— The chinch bug is very 

 important as a farm pest. It has a long, slender body with 

 parallel sides and four-jointed antennte. The body is black 

 and the wings white. It occurs all over the Mississippi 

 Vallev and south to Central America but it is most serious 



