126 
CRABS AND INSECTS. 
days assumes the pupa state, a few weeks later appearing 
as a full-fledged beetle. 
Fic. 155.—Suckers on tarsus of fore- 
limb of Dytiscus marginals, 
Others of more ‘or less interest 
are the long-horned 
beetles (Cerambycide), 
weevils (Curculioni- 
de), tiger-beetles (C7- 
cindela), ground-bee- 
tles (Carabus), bury- 
ing-beetles (Si/phide), 
etc, 
Works on Coleoptera for 
Surther 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 
Meloide,” C. V. Riley, 
“Transactions of St. Louis 
Academy,” vol. iii, No. 4; “Colorado Potato Beetles,” C. V. Riley, 
’ 
‘Popular Science Monthly,’ 
relles,” 1869-'70. 
Order VI. Two-Winged In- 
sects (Diprera).— General Charac- 
teristics. —T wo-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 (J/usca).—The common 
fly hibernates in winter. The eggs 
are deposited in offal about sta- 
bles, remaining in the pupa state 
vol. vii; ‘‘Annales des Sciences Natu- 
Fic. 156.— Blue-bottle fly 
(Musca vomitoria), larva 
and pupa. 
