112 Weevils of the Genus Sitona 



Legs. Femora black, those of 2nd and 3rd pair reddish at base and 

 apex. Covered with pale scales and flat setae. Tibiae and tarsi ferruginous 

 with pale setae. 



Antennae. Rather short, ferruginous, with club darker. 



External Sexual Differences. 

 Posterior abdominal segments similar in form to those of *S'. lineata. 



Species liable to he confused with S. crinitus and characters 

 which distinguish them. 

 S. Waterhousei Walt. Breadth of head across eyes 2| times the width 

 of the rostrum at the apex. 



S. regensteinensis Herbst and S. tibialis Herbst. Anterior coxal 

 cavities reaching presternal line. 



S. lineellus Gyll. Forehead between the eyes quite flat. 

 S. hispidula F. See p. 98. 



Wings of S. crinita. 

 All the specimens of S. crinita so far examined have had fully 

 developed wings. 



Eggs. 



The egg measures from 0-34 by 0-26 mm. to 0-36 by 0-29 mm. 



Larva. 

 The larva measures about 5 mm. 



The Pupa. 

 The pupa measures from 3-8 to 4-9 mm, 



Life-History. 



The hfe-history of S. crinita is closely similar to that of S. lineata and 

 can be summarised as follows: 



Imagines. Newly emerged specimens, sexually immature, were ob- 

 tained from peas in Suftolk on August 4th. Other specimens collected 

 in September and October from lucerne, medick and seedUng tares in 

 Kent and Suffolk were also sexually immature. Sleeved upon clover 

 out of doors these beetles laid no eggs till the following spring when 

 oviposition commenced in May. Specimens collected in the field in April, 

 May and June were laying eggs. The majority of the beetles collected 

 from the field at this time died o& before the autumn of the same year, 

 but a few individuals have Uved in captivity in the laboratory for over 

 two years. 



