260 [Noviiiber, 



"is readily distinguished from that of i>. lucorum by its always having tlio 

 entire head clothed with black pubescence." In Saunders's " Hymenopteva 

 Aculeata," 1896, lucorum is united with virgincdis under B. terrestns Linn., 

 and the description commences : " Head clothed with black hairs, or in 

 Tar. lucorum S on the face with yellow." In " The Humble Bee," by F. L. 

 Sladen, 1912, following on the description of the usual form of i?. lucorum S 

 one finds " Dark specimens are coloured almost like terrestris {hexe =vir(jinalis) 

 " but the tail remains pure white." We are not definitely told here that llie 

 resemblance to terrestris may extend to the black-haired face and head, but 

 such is the case, and consequently F. Smith's ready means of distinguishing 

 the two males will not always hold good. During three weeks spent last 

 August in Littondale — a charming dale about 10 miles in length, connecting 

 Wharfedale with the foot of Penyghent — I found dark black-faced males of 

 B. lucorum extremely abundant. In the valley-bottom, at 800 ft., on Scabious, 

 they were in about equal numbers with the common form, together with a very 

 few intermediates ; but on the sides of the high ridge which separates Lilton- 

 dalft from Wharfedale and Langstrotlidale I could only take the dark ones. 

 In the course of various walks, covering a distance of over five miles, along the 

 heather (C'alhma) at 1500-1700 ft., I netted and examined hundreds of speci- 

 mens without taking a single one with yellow hairs on the head or face, and in 

 every case the coloration appeared to be almost exactly that of the queen and 

 worker. It looks as though we have a mountain race of ^. lucorum exhibiting 

 little or nothing of the sexual colour dimorphism so noticeable in the common 

 form. It hardly seems likely that the summerless season could account for 

 such a wholesale production of dark males. I did not meet with B. terrestris 

 in the district. The other Bomhi taken were lapidarius, jiratorum, jonelUis, 

 soroensis, distingucudus, hortorum, agrorum, and muscorum var. palUdus. — 

 A. H Bradley, 8 Shaftesbury Avenue, Rouudhay, Leeds: October llth, 19i'0. 



'i Enumkijatio Hemjpterorum Heteropterorum Faunae Fennicar." 

 Editio secunda aucta et emendabi. By J. Sahlberg. Helsingfors, 1920. 



The work now before us is one of the last upon which its eminent author 

 was engaged before his recent lamented death. During the 40 years that 

 have elapsed since it first appeared, the palaearctic Hemiptera have become 

 much better known, and many changes of nomenclature have been made ; henre 

 the present emended issue. The scheme of the work is very simple ; no descrip- 

 tions, except of new species or varieties, are given, but each species enumerated 

 is dealt with under two heads, the first referring to the diagnoses in the works 

 of all the standard authors, and to the Palaearctic catalogues already in exis- 

 tence, and the second consisting of notes on distribution, habitat, etc. The 

 notes include the general distributional area, the northernmost extension of 

 each species, their relative abundance, allusions to the macropterous and 

 brachypterous forms, where both occur, the season of capture, and the food- 

 or host-plants. Into the compass of some 200 odd pages is compressed a large 

 amount of carefully compiled information bearing upon the biology of 

 the species, and the distribution in Finland itself is made clearer by the ad- 

 dition of a table showing the presence, or otherwise, of each species in each of 



