CLOVEK-LEAF WEEVIL. 



be brown or blackish [posterior segments yellowish]; the surface of the body much 

 rougher in this stage than in others, the triangular points of the cuticle standing out 

 prominently; tubercles [fig. 5] on thoracic segments below very strong and the hairs 

 more prominent than in earlier stages. Length 8 to 14 mm. 



Cocoon [fig. 6]- * * * Oval, 9-10 mm. long and 6.5 to 7 mm. wide. [A fine net- 

 work of coarse threads which are light straw color when spun and brown after aging.] 



Pupa: When first formed with yellow-green head [lighter colored antennae, legs 



and wing-pads] 



Abdomen dark green with a distinct pale dorsal line 

 that extends onto prothorax * * *. Frontal row 

 of hairs rather distant from margin; central pairs 

 close together, three following pairs form a curved 

 . line ending near the posterior outer edge; a few 



|| hairs on remainder of thorax; transverse rows of 

 blunt setse on each dorsal abdominal segment; 



Fig. 5. — Full-grown larva of the clover- 

 leaf weevil, lateral view. Much en- 

 larged. 



Fig. 6.— Cocoon of the clover-leaf weevil sur- 

 rounded by leaves of clover plant. En- 

 larged. 



hairs on beak rather short and thin; those on anal segment moderately long, stout 

 and dark. [The pigmentation of the eyes, mandibles, and leg joints occurs at later 

 dates in order named.] Length 5.5-7 mm. Width 3.5-4.5 mm. 



The measurements of the larva are given in tabular form, as fol- 

 lows: 



Table I. — Larval Tneasurements (mm.) of JSypera punctata. 





First instar. 



Second Instar. 



Number of specimens averaged. 



Width 



of 

 head. 



Length of body. 



Width 



of 

 head. 



Length of body. 





Mini- 

 mum. 



Maxi- 

 mum. 



Aver- 

 age. 



Mini- 

 mum. 



Maxi- 

 mum. 



Aver- 

 age. 



24 



0.2 



1.9 



3.4 



2.7 











20 





0.55 



1.8 



5.9 



3.8 









1 







Third instar. 



Fourth instar. 



Number of specimens averaged. 



Width 



of 

 head. 



Length of body. 



Width 



of 

 head. 



Length of body. 





Mini- 

 mum. 



Maxi- 

 mum. 



Aver- 

 age. 



Mini- 

 mum. 



Maxi- 

 mum. 



Aver- 

 age. 



18 



0.8 



3.8 



9.5 



6.3 











19 



1.2 



5.1 



13.1 



9 3 















