164 fJ"^y' 



AVhcn lookinrr at the two insects to2;ether, the conviction was 

 irresistible that one had to do with two perfectly good species. 

 The case, however, apparently presented analogy to the pini-afrifrons 

 diiBculty, inasmuch as the external aspect of the appendages of the ^ 

 seemed to be similar in both forms. But it differed in this way : in 

 the constituents of the pini-atrifrons group, as regards general appear- 

 ance, there was a blending of the forms which, as Mr. McLachlan 

 pointed out, left one in a state of uncertainty as to the true loca- 

 tion of certain specimens ; while between H. concinnus and quadri- 

 fasriatus no specimen that could reasonably be regarded as transitional 

 had ever come under my observation. I am aware that at least one of 

 my colleagues (Prof. Klapalek) considers that through the apparently 

 blending forms of H.pini and H. atrifrons a subtle line can be drawn, 

 but so far this line forms no image on my retina. His opinion, how- 

 ever, is worthy of full consideration. 



But whether //. pini and H. atrifrons are distinct species or no, 

 they are sufTiciently near to each other to prevent any surprise at the 

 close resemblance which exists in the appendages of the two. On the 

 other hand, H. conchiniiti and qnadrifasciatiis are so different looking 

 that the great similarity in these parts is rather remarkable. How- 

 ever, as far as the ratlier restricted available material of the latter 

 form allows a decision, one fine point of distinction exists, and the 

 primary object of the present notes is to draw the attention of 

 observers to this character. For my own part, even with the small 

 amount of material under review, I am satisfied that the two forms 

 are distinct species. 



Renter's diagnoses (in Swedish) may be rendered thus : — 

 H. CONCINNUS, Stephens. 



Fore-wings oehreons-yellow or brownish-yellow, with darker markings about 

 the gradate nervules and small spots along the outer and inner margins, besides 

 often angulated shadings about the nervures. Body uniformly ochreous-yellow or 

 brownish-yellow, sometimes with the sides of the thorax and face blackish-brown. 



H. QTJADRiFASCiATUS, Eeuter. 



Fore-wings pale grey, with brownish-grey spots along the margins and angulated 

 markings about the nervures ; also four nearly unbroken brownish-grey transverse 

 bands at about equal distances from each other, the first running over the furcation 

 of the cubitus and the origin of the second radial sector, and the last over the outer 

 row of gradate nervules. Face pitchy-brown, thorax in the middle yellowish, on the 

 sides pitchy-brown. Abdomen brownish. 



As Renter states, quadrifasciatus recalls //. nervosus, and I have 

 received it under the latter name. The transverse bands vary and are 

 not always very complete. The general aspect of concinnus is 

 yellowish, as opposed to the grey of quadrifasciatus. 



