1912.] 263 



A disthiction between Anoplus plantaris, Nsez.,and A. rohoris, Suffr. — Though 

 the relative size and food-plants of these two weevils as a rule make discrimina- 

 tion fairly easy, it may he useful to jDoint out a positive character which I have 

 not seen mentioned in the text books. This is to be found in the thorax, which 

 is alutaceous between the piinctures in the case of A. roboris, ])ut smooth in 

 A. "plantaris. — J. R. lb B. Tomlin : October 14(?i, 1912. 



Note on the prosternal structure, Sfc, of Dorcatoma flavicornis, F., and D. chry- 

 somelina, Sturm. — I have recently had occasion to examine the prosterniun of 

 these two species, and as the diiferential characters to be found in this portion 

 of the under svxrface do not appear to have been mentioned in our British 

 literature, it is worth while calling attention to the sitbject. In both insects 

 the broad, depressed, intercoxal process of the prosternum is produced behind 

 into two long, flattened, erect, horn-like processes, which are probably 

 used to guide the large 3-jointed, folded-up, antennal club into the very 

 deeply excavate mesosternum. In D. flavicornis the processes are contiguous at 

 the base, while in D. chrysomelina they are widely separated and the depressed 

 intercoxal portion of the prosternum is broadly arcuate-emarginate between 

 them. These processes are altogether wanting in the allied genus Caenocara, 

 Thoms., and of covirse are completely invisible when the insect is in its normal 

 retracted condition. It may be noted also that the antennae are 9-jointed in 

 D. flavicornis and 10-jointed in D. chrysomelina. In both genera the number of 

 minute, transverse, closely-articulated joints between the two stout basal ones 

 and the large 3-jointed club varies according to the species, and examples of 

 D. flavicornis may be found in which two of these small joints are fused in one 

 antenna and free in the other. — G. C. CHAMriON,Horsell, Woking: October 10th, 

 1912. 



Henoticus serratits, Gyll., and Pentarthrum huttoni, Woll., in London. — I am 

 glad to record the occurrence of two specimens of Henoticus serratus, Gyll., which 

 were taken in the offices of Messrs. Moet and Chandon, Craven House, W.C., on 

 July 25th last. Mr. Ashby, the manager, informs me they were found in the 

 office and not in the vaults. I am indebted to Mr. Newbery for the identification. 

 During the year Mr. Ashby has also sent me foiu- examples of Pentarthrum 

 huttoni, Woll., taken imder the same conditions, on July 12th and 2uth, August 

 14th, and September 25th. — Stanley A, Blenkarn, Norham, Cromwell Eoad, 

 Beckenham : October Brcl, 1912. 



Lathrobium dilutum, Er., at Nethy Bridge. — I took a nice series of this rare 

 species during the latter part of July and the beginning of August, iinder 

 stones resting on damp sand in dry portions of the bed of the river Nethy, and 

 also foixnd larvae of the species. It will he remembered that the insect was 

 introduced by Dr. Joy on three specimens taken in the autumn of 1909, at 

 Dalwhinnie (Ent. Mo. Mag., Vol. xlv, p. 268), which lies about thirty miles 

 south of Nethy Bridge. — T. Hudson Bbare, 10, Regent Terrace, Edinburgh : 

 September 24-th, 1912. 



