Mr. J. Walton on the genus Bmchus. 207 



2. B. rufimanus, Schonh., Germ., Steph. Man. 



— Fisi, Fab., Mus. Banks.* 



— granarius. Marsh, (not Linn.*), Steph. 



— Pisi, Steph. 



— Pisi, Kirb. MSS. et Mus. 



— granarius, Kirb. MSS. et Mus. 



This species resembles the preceding, with which it has 

 been confounded, nevertheless it is essentially distinct : it is a 

 shorter and a smaller insect than the B. Pisi of Linnaeus, and 

 differs moreover in having the thorax longer in proportion to the 

 breadth ; the teeth at the sides smaller, sometimes indistinct ; the 

 elytra shorter, and the white spots differently disposed ; the ob- 

 long fuscous spots on the pygidium frequently obsolete ; the an- 

 terior femora rufo-testaceoiis, and the posterior femora subdentate, 

 or more or less distinctly dentate. (Length If — 2 lines.) 



The large varieties (which are probably the females) have the 

 thorax proportionately longer and broader in front than the 

 smaller varieties : the former are the B. Pisi, and the latter the 

 B. granarius of the British cabinets, a fact which was first observed 

 by myself. I sent examples of this species to Schonherr and 

 Germar, and possess foreign specimens forwarded to me by these 

 authors under the name of B. rufimanus. 



In this country it is the most abundant species of the genus. 

 I have taken numerous individuals of the perfect insect alive out 

 of the interior of the large garden bean, the horse bean, and from 

 several other varieties ; the larva evidently completes its meta- 

 morphosis within these seeds, consuming a considerable portion 

 of the interior ; I have examined many varieties of the pea, which 

 had been eaten, I think, by the larvae of this species, but never 

 found in the interior a perfect insect : Mr. Marshall observed in 

 a barn in Kent a quantity of peas infested by this beetle which 

 had destroyed nearly half the crop ; in every pod that he opened 

 he found an insect, and the exterior part of the peas was more 

 or less consumed. 



3. B. flavimanus (Megerle in Litt.), Schonh. ? 



— Pisi, Fab., Mus. Banks. 



Oblong-ovate, black, densely clothed with a yellowish brown 

 pubescence, and variegated with whitish spots : the antennae with 

 the four basal joints rufo-testaceous : thorax subtransverse or 

 rather broader than long, the lateral margins, behind the middle, 

 deeply sinuated, and before the sinus armed on each side with 

 a distinct acute tooth, above moderately convex, closely and 



* I have many times carefully examined the species of the genus Bru- 

 chus contained in the Linnaean and the Banksian cabinets, and intend to 

 publish in a separate paper some observations upon them. 



