228 [October, 



a good many suitable-looking trees, I failed to find the insect 

 elsewhere. 



Mr. Chani]nmi kindly identified the species for me, and I am 

 indebted to him for the description and notes as to distribution. 



2 Westbury Terrace, 



Westerham, Kent. 

 September 10//;, 1921. 



\_Aradus hetulae L. 



Broader and more elongate than A. corticalis L., and readily 

 separable therefrom by the blacker general coloration ; the long, com- 

 paratively slender antennae, with very elongate second joint ; and the 

 more broadly foliaceous sides of the pronotum. The liannoch speci- 

 mens, a S and $ of which have been given me hj Mr. Harwood, may 

 be described thus :— 



Black, variegated with pale greyish brown, the expanded margins of the 

 prouotum almost wholly of that colour, the markings on the coimexivum 

 rirddisli. Head with a long, stout central lobe in front ; antenniferous 

 tubercles long, acute; uu teniiae long-, rather slender, joint 2 more than three 

 times the length of 3, 3 a little shorter than 4; prouotum broadly, arcuately 

 dilated at the sides, 4-(;ariuate on the disc and with a loiigitudiual prominence 

 on each side near the hind angles, the margins with coarse scattered teeth, the 

 one at tlie anterior angles prominent ; elytra rapidly, sinuously narrowing 

 from a little below the base, leaving the broad coiinoxivum exposed ; mem- 

 brane in (5 alninst covering the terminal genital segment, iu $ leaving two 

 segments exposed. 



Length 8-9 mm. 



Continental specimens of this widely-distributed insect are usually 

 paler than these Scotch examples, and have the third antennal joint in 

 part testaceous, this joint also varying in colour in a similar manner 

 in A. corticalis ; two A. hetidae before me, from the Caucasus and the 

 Amur respectively, have the third joint black, as in the Rannoch insect. 

 I have taken A. hetulae and A. corticalis in numbers in different stages 

 of development at Binn, Switzerland ; A. corticalis, singly, in the New 

 Forest ; and A. hetulae at Vizzavona, Corsica; Gabas, Basses Pyrenees, 

 Macugnaga and Pro St. Didier, N. Italy, and Logrono, Spain, the 

 specimen from the last-named locality having been named for me by 

 lieuter. A. aterrinms D. and S. and A. truncatiis Fieb. ( = laivsoni 

 Saund.) have a shorter second antennal joint to the antennae than 

 A. hetulae, and also differ from it in other particulars. Good figures of 

 •^he males of A. de_pressus F., A. truncatus Fieb., and A. corticalis 

 L. are given by E. Saunders in his "Hemiptera Heteroptera of the 



