OTHEB A-iFMBPRt' op -f-gp^ (-.y ,\^,s; ,-. rvsiBT'TA 



Squash bug, scale insects, cicadas, etc. - Tlic unJor, 

 Hetiiiptera, is a \-ery large one containing besides the ones 

 named, a host of otliei-s, as the water Ixiatrnen, back 

 swimmers, stinkbugs, 

 etc., that are kno«ii 

 as the " bugs." The 

 mouth parts urefnniit'd 

 for suckinij and the 

 metamorpliosis i.s ;'/;- 

 complete. Those thai 

 possess ivings liave 

 two pairs. Most nfthie 

 members of the order 

 have the basal half of 

 ihe front vings thick- 

 ened, but tlie other's 

 liave the front icings 

 thin throughout llieir 

 ■whole length. Most 

 people call any insect j,^ 

 a bug ; but entomolo- 

 gists restrict the term 

 to insects like those 

 mentioned in this paragraph. Unlike the locusts, the 

 bugs have sucking mouth parts. The iriandibles and 

 maxilhe have grown out into long, slender, bristlelike 

 organs. These four bristles are inclosed in a segmented 

 sheath formed by the lower lip (Fig. 115). The bristles 

 and sheath together form a " bill," or " beak," as it is 

 called. This beak is plainly seen on the ventral side of 

 the thorax, between the bases of tlie legs, in a squash bug, 

 harleciuin cai^bage bug or dog-day harvest fly. With care 



11.5. — Heai.! of a do,i;-(la>' har\i',yt Hy, eu- 

 larjioil to slio\^' mouth part.s : Md. mandibles ; 

 Mx, maxilla.-; iS'. .slieatli, fctrmod by the lower 

 li|), in whicli the tour Ijristles are earried. 



