— 81 — 



CCC. Frontal tubercles distinct — Phorodon. 

 BB. Honey tubes short, beak short, antennae smooth — Callipterus. 

 AA. Antennae shorter than the body. 



B. Honey tubes 'long; antennae not hairy — Aphis. 

 BB. Honey tubes sort; antennae hairy. 



C. Beak long — Lachnus. 

 CC. Beak short. 



D. Body tuberculate with long and slender hairs — Chai- 



tophorns. 

 DD. Body not hairy — Mclano.vautJms. 



Chief Genera of the Pcmphiginae. 

 A. Third discoidal vein simple. 



B. Hind wings witli two discoidal veins — Pemphigus. 

 BB. Hind wings with but one discoidal vein. 

 C. Antennae 6-jointed — Tetrancura. 

 CC. Antennae 5-jointed — Hovuiaphis. 

 AA. Third discoidal vein forked. 



B. Hind wings with two discoidal veins — Schizoncnra. 

 BB. Hind wings with one discoidal vein — Colopha. 



Chief Genera of the Chcrmesinac. 



A. Antennae 5-jointed — Chcrincs. • 



AA. Antennae 3-joined — Phylloxera. 



CARABIDAE. 



(Ground-beetles.). 



(After Leconte and Horn). 



Common Genera. 



A. Middle coxal cavities entirely closed by the sterna. 



B. Head with two punctures above the eye, each bearing a single bristly 

 hair. 



C. -Margin of elytra interrupted at posterior end and with a distinct 

 internal fold ; three basal joints of antennae glabrous. 



D. Last joint of palpie as long as or longer than the next to the 

 last and cyVmdTlcal-^Pterostichns. 



DD. Last joint of palpi shorter than the next to the last — Amara. 

 CC. Margin of elytra not interrupted posteriorly and without an 

 internal fold. 



D. Penultimate joint of labial palpi with but two bristly hairs ; 



elytra truncate at tip ; front tibiae slender ; tibial spurs 



short, head constricted behind the eyes — Lebia. 



DD. Penultimate joint of labial palpi with a number of bristly 



hairs in front and always longer than last joint; first 



antennal joint elongate ; head olnngate oval, prolonged 



behind the eyes — Galerita. 



