40 Key to Families of North American Insects. 



Tarsal claws toothed or cleft; head deflexed, with the front vertical; elytra 

 often shortened; body more or less cylindrical; moderately large beetles. 

 Blister beetles (Meloe, Nemognatha, Macrobasis, Epicauta, PomphopcEa) 

 (PL 5 fig. 99) {CANTHARID/E LYTTID.'E) MELOK)^ 



108. Submentum pedunculate, i. e. the mentum supported at its base by a narrow 



portion or peduncle; antennae serrate; head prolonged into a broad muzzle; 

 elytra shortened so as to expose the pygidium. Pea and bean weevils. 

 (Bruchus [B.obtectus, Bean- weevil; B. fisbrum. Pea-weevil], Spermophagus) . / 



(PI. 5, fig. 10!2) {LARIIDM, MYOLABRID.E) BRUCHID.S 



Submentum not pedimculate; head not prolonged into a broad beak; antennfe 

 rarely distinctly serrate 109 



109. Antennae usually long or greatly developed, frequently inserted on frontal 



prominences; front often vertical, large and quadrate; pronotum rarely 

 margined; tibial spurs distinct; usually rather large, elongate or oblong 

 beetles with parallel sides and pubescent upper surface. Longicorns. 

 (Parandra, Elaphidion [Twig-pruners], Cyllene [C. roUnioe, Locust-borer], 

 Monohammus, Saperda [S. cdndida. Round-head apple-borer], Tetraopes) 

 including SPONDYLID.E. (PI. 5. fig. 100; PI. 7, fig. 167.) / 



CERAMBYCm.^ 

 Antennae moderate or short, not inserted on frontal prominences; front small, 

 oblique, sometimes inflexed; pronotum most frequently margined; tibial 

 spurs usually wanting; small or moderate sized; body usually glabrous above 

 and very often brightly colored; rather oval in form. Leaf Beetles. (Dona- 

 cia, Cryptocephalus, Pachybrachys, Calligrapha, Criocerus [C. aspdragi, 

 Asparagus-beetle], Galerucella [G. hiteola. Imported elm-leaf beetle], Dia- 

 brotica [Corn root-worms], Haltica [Flea-beetles], Epitrix [Flea-beetles] 

 Chalepus {=Odontbta), [C. dorsdlis. Locust leaf-miner], Leptinotarsa 

 {= Doryphora) [L. decemlineata, Colorado potato-beetle]) (PI. 5, fig. 104; 

 PI. 7, fig. 157) CHRYSOMELm^ 



110. Rostrum extremely short and broad, scarcely developed; antennae short, with 



a broad club; tibiae often with several teeth externally; small, oval or cylin- 

 drical beetles of uniform brownish or blackish color Ill 



Rostrum of variable length, but always distinctly developed and usually 

 long; antennae with a less pronoimced club or not clubbed; tibiae without a 

 series of teeth externally 112 



111. First joint of the tarsi as long as the others united; head broader than the 



prothorax; eyes rounded. (Platypus) (PI. 6, fig. 116; PL 7, fig. 156). 



PLATYPODID^ 

 First joint of the tarsi much shorter than the combined length of the others; 

 head narrower than the prothorax; eyes oval, emarginate or divided. Bark- 

 beetles. (Ips (=Tomicus), Eccoptogaster [E. rugulosus. Shot-hole borer; 

 E. multistriatus. Imported elm bark-beetle], Dendroctonus [Pine and Spruce 

 bark-beetles], Xyleborus [Timber- beetles], Monarthrum) (PL 6, figs. 112, 

 122; PL 7, figs. 154, 155, 162) {SCOLYTID.E) iPJDM 



112. Antennae not elbowed; palpi usually exposed 113 



Antennae almost always elbowed, with the basal joint much elongated; palpi 



■/ 



