134 [June. 



point hitherto somewhat uncertain.* Among the striped specimens of 

 S. griseus taken, there occm'red, in some numbers, an entirely uni- 

 colorous, dark reddish-brown variety, without any trace of the usual 

 whitish linear elytral fascia : this is the typical form, according to the 

 description of Fabricius and his British types, still preserved in the 

 Banksian collection in the British Museum. The names suturalis 

 Herbst (1784), and sutura-aiha 01. (1790), apply, of course, to the 

 lineate examples. Another species rather abundant on the broom is 

 Cneorrhimis exaratus. Then, by general sweeping, such species have 

 been taken as Apion marchicum, Gronops htnatus, and Sibinia potent- 

 illae in great abundance ; also more or less frequently, Acalles 

 turhatus, Bhinoncus bruchoides, and M. perperidicularis, and from the 

 birch, Balaninus cerasomm. Of the Heteromera, besides the Hypo- 

 phloeus and the Sphaeriestes already referred to, except an odd 

 specimen or two of Orchesia minor, nothing has been observed worth 

 notice. And here I must bring to a close these imperfect notes on 

 the Coleopterous fauna of an interesting, and certainly a specialized, 

 district — a fauna which has been distinctly modified by the recent 

 operations of mankind. 



Charterlea, Crowthorne : 

 December 2nd, 1915. 



THE GEOGEAPHICAL DISTRIBUTION OF DIMOBPHA (ENDROMIS) 



VEBSICOLOBA L., AND WHAT IT SUGGESTS. 



BY J. W. H. HARBISON, B.Sc. 



During some recent work on the Bistoninae, the necessity arose 

 for working out their past and present geographical distribution — a 

 necessity that led to a similar investigation into the range of other 

 forms inhabiting the same area. Amongst the species so studied was 

 Dimorpha versicolor a L., which, like Lycia hirtaria CI., and some 

 other insects, displays a double distribution in our islands. My 

 examination of the available facts concerning this species had such 

 interesting results that I consider them worthy of special treatment, 

 for any fact, no matter how small, which can throw light on the history 

 of the flora and fauna of our islands, is worthy of being put on record. 



Dimorpha versicolora, of all European moths, is the most isolated, 

 for it forms the type of a super-family containing no other species than 



* It occurs in abundance in some years on broom in the Woking district, but the unicolorous 

 typical form is scarce. — G. C. C. 



