320 ECONOMIC ENTOMOLOGY 



Eggs. — Cylindrical oval grey objects, I^q inch long; laid on or in the 

 young pods or stored beans; hatch in 5-20 days. 



Larva. — A small whitish fleshy wrinkled grub; matures in 11-42 

 days. 



Pupa. — White and delicate; enclosed in an oval pupal chamber 

 within the bean; duration 5-18 days. 



Life-history. — -The larva enters the seed, where it feeds and grows 

 until autumn when it changes to a pupa, and a little later to the beetle. 

 Propagation may take place for several generations in the dry beans. 



Control. — Fumigate with carbon bisulphide or superheat as for pea 

 weevil. 



CERAMBYCIDiE (LONG-HORN BEETLES) 



Common Economic Genera: 



A. Thorax margined; labrum united with clypeus; body broad and depressed. 

 — Prionince. 



B. Antennae ii-jointed; body elongate, parallel. — Orlhosoma. 

 BE. Antennae 12-20-jointed; body stout, broad. — Prionus. 

 A A. Thorax not margined; labrum free; body oblong and cylindrical. 



B. Front tibiae obliquely grooved on inner side; last joint of palpi pointed 

 at tip. — Lamiina. 



C. Elytra spined; size small. — Psenocerus. 

 CC. Elytra not spinose; large size. 



D. Scape of antennae with an apical scar; body elongate. — 

 Monohammus. 

 DD. Scape of antenna without apical scar. 



E. Tarsal claws divaricate and simple. — Saperda. 

 EE. Tarsal claws divaricate and cleft. 



F. Eyes not divided; thorax cylindrical. — Oberea. 

 FF. Eyes divided; thorax with blunt tubercle on each 

 side and marked with four black spots. — Tetraopes. 

 BB. Front tibiae not grooved; last joint of palpi not pointed at tip. — 

 Cerambycince. 

 C. Base of antennae partly enveloped by the eyes; front coxae not 

 conical; eyes finely granulated; scutellura rounded behind; 

 tibial spurs large. 

 D. Head small; process between hind coxae rounded. 



E. Thorax transversely excavated at sides and with 

 three yellow cross hands.— Cyllene. 

 EE. Thorax not excavated at sides and without yellow 

 cross bands. — Plagionotus. 

 DD. Head large; process between hind coxae acute. — Clyttts. 

 CC. Base of antennje not enveloped by the eyes; front coxae conical. — 

 Desmocerus. 



