198 INTRODUCTION TO ZOOLOGY. 



K— Ventral segments 7 or 8 (LampyridrE.) 



KK— Ventral segments S or 6 (Malachildse.) 



EBE— Antennas with a lamellate club ; legs tossorial. 

 F— LamellEe of club not capable ot close apposition, and usually not 



flattened (Lucanidffi.) 



FP— Lamellae of club of anteuuiB capable of close apposition, and 



flattened iScarabeidas.) 



C'C— Fourth and fifth tarsal .ioints grown together, the fourth very small, 

 hence apparently 4-jointea; Antennae filiform, rarely serrate, or 

 feebly thickened externally. 

 D— Tarsi dilated and spongy beneath. 

 E — Antennae usually long or greatly developed, frequently inserted on 

 frontal prominences; front often vertical, large and quadrate; 

 pronotum rarely margined ; tibial spurs distinct. (Cerambycidae.) 

 EE— Antennae moderate or short, not inserted on frontal prominences; 

 front small, oblique, sometimes inflexed; pronotum most fre- 

 quently margined ; tibial spurs usually wanting. 



(Chrysomelidae.) 

 EEE— Front prolonged into a broad, square beak ; antennae inserted In 

 front of the eyes, variable in length serrate or pectinate. 



(Bruchidse.) 

 DD— Tarsi not dilated; sensitive surf ace in deep impressions. (Spondylidae.) 

 BB— Front and middle tarsi D-jomted ; hind tarsi 4-jointed. 

 C— Anterior coxal cavities closed behind. 

 D— Tarsal cla\fc simple. 



E -Penultimate joint of the tarsi not spongy (Tenebrionidae) 



EE — Penultimate joint of the tarsi spongy beneath (Lagriidffi.) 



DD— Tarsal claws pectinate ." (CistelidK.) 



CC— Anterior coxal cavities open behind. 

 D— Head not suddenly and strongly constricted at the base. 

 E— Middle coxae not very prominent. 



P— Thorax margined at the sides (Melandryidae. ) 



FF— Thorax not margined (Pythldae.) 



EE — Middle coxae very prominent (CEdemeridiE. ) 



DD~Head suddenly and strongly constricted at the base. 

 E — Lateral sutures of the thorax distinct; base as wide as the elytra. 



P— Hind cox^ laminiform (Mordellldae.) 



FF— Hind coxae not laminiform (Melandryidaa. ) 



EE — Lateral sutures of the thorax wanting. 

 F— Tarsi perfect, with distinct claws; eyes normal; prothorax at the 



base narrower than the elytra (Anthicidas.) 



G— Hind coxae not prominent. 

 GG— Hind coxae large, prominent. 



H— Claws simple ; head horizontal (Pyrochroidae.) 



HH— Claws clef tor toothed; front of head vertical (Meloidae.) 



FF — Tarsi with distinct claws; eyes normal; prothorax at the base as 



wide as the elytra (Bhipiphoridee. i 



FFP — Tarsi without claws ; eyes pedunculated (Stylopidae.) 



AA— Head more or less prolonged into a beak ; palpi rigid and labrum wanting 

 (except In Anthribid^); gular sutures entirely confluent along median 

 line ; prosternal sutures wanting. 



B— AntenniE straight, filiform (BrenthidaB.) 



BB— Antennae clavate, often geniculate. 



C— Elytra without any fold, or with a very feeble one on the inner surface 

 near the edge ; male and female pygldium alike. 

 D— Labrum wanting; mandible flat, toothed on the inner and outer sides. 



(Rhynchitidae. ) 



DD— Labrum wanting; mandibles stout, pincer-shaped (Attelabidae.) 



CO —Elytra with a strong fold on the inner surface. 

 D— Pygldium of the male divided. 



E — Tarsi setose, or spinose beneath, narrow (Byrsopidae.) 



EB— Tarsi usually dilated, brush-like beneath. 



F— Mandibles with a deciiluous piece, which is lost soon after coming 



out of the pupa state, and leaves a scar (OtiorhynchidaeO 



FP— Mandibles without an accessory piece (Cm'culionidse.) 



DD— Pygldium of both sexes undivided. 

 E— Pygldium surrounded at the edge by the elytra ; tibiaa usually serrate. 



(Scolytidae.) 



