FIELD BOOK OF INSECTS. 



joints reddish; legs reddish-brown, underside of hind 

 femora black. In the field the eggs are laid upon, or are 

 inserted in, the bean-pod, but eggs are also placed loosely 

 among shelled beans. The larvae and pupae are much like 

 those of pisorum but, unlike that species, more than one 

 (28 have been recorded) may be inside a single seed. The 

 life-cycle takes from three to twelve, or more, weeks, 

 depending on conditions. Breeding is continuous through- 

 out the year, if it is warm enough. 



HETEROMERA 



The members of this series have five tarsal joints on 

 each of the front and middle legs and only four on each of 

 the hind legs. 



1. Front coxal cavities closed behind 2. 



Front coxal cavities open behind 4. 



2. Tarsal claws simple 3. 



Tarsal claws comb-like CISTELIDJE (p. 384). 



3. Next to last joint of tarsi not spongy beneath 



TENEBRIONID.E (p. 381). 



Next to last joint of tarsi spongy beneath; front coxae 

 prominent; last joint of antennae at least as long as the 

 three preceding joints combined LAGRIID^E (p. 384). 



4. Head not strongly and suddenly constricted behind 

 the eyes 5. 



Head strongly and suddenly constricted behind the 

 eyes 7. 



5. Middle coxae not very prominent 6. 



Middle coxae very prominent; pronotum narrower at 



base than elytra, its sides rounded and without a sharp 

 edge; next to last tarsal joint broad, slightly bilobed; 



body-covering rather flimsy in texture 



QI)DEMERID^: (p. 385). 



6. Pronotum margined at sides, broad at base, its disk 

 (middle portion) with impressions near base; form usually 

 elongate, loosely jointed; maxillary palpi usually long and 

 pendulous, with the joints enlarged 



MELANDRYID/E (p. 385). 



Pronotum not margined, narrower behind, disk not 

 impressed at base; form usually long and narrow; head 

 sometimes prolonged into a beak PYTHID^E (p. 385). 



380 



