126 



CRABS AND INSECTS. 



days assumes the pupa state, a few weeks later appearing 

 as a full-fledged beetle. Others of more or less interest 



are the long-horned 

 beetles (Cerambyadce\ 

 weevils (Curculioni* 

 li , -to), tiger-beetles (Ci- 

 cindela), ground-bee- 

 tles (Carabus), bury- 

 ing-beetles (SityAufo), 

 etc. 



Works on Coleoptera for 

 further reference. 



" List of Coleoptera of 

 North America," J. L. Le 

 Conte, "Smithsonian Mis- 

 cellaneous Collections," 

 vol. vi, No. 3 ; " Larval 

 Habits of the Blister-Bee- 

 tles, and Remarks on oth- 

 er Species of the Family 

 Meloidse," C. V. Riley, 

 "Transactions of St. Louis 



Academy," vol. iii, No. 4; "Colorado Potato Beetles," C. V. Riley, 

 "Popular Science Monthly," vol. vii ; "Annales des Sciences Natu- 

 relles," 



FIG. 155. Suckers on tarsus of fore- 

 limb of Dytiscus marginalis. 



Order VI. Two-Winged In- 



sects (Diptera). General Charac- 

 teristics. Two-winged insects with 

 mouths formed for sucking or lap- 

 ping, composed of from two to six 

 needle-like bristles forming a pro- 

 boscis encircled in a sheath ; meta- 

 morphosis complete. 



Flies (Mused], The common 

 fly hibernates in winter. The eggs 

 are deposited in offal about sta- 

 bles, remaining in the pupa state 



FIG. 156. Blue-bottle fly 

 (Muse a vomit or id), larva 

 and pupa. 



