lOG "Mv. F. Bal four-Browne on the 



of tlie groove is so widened tliat it spreads over the vvliole ov 

 most of the width of tlie expanded part (type -4). In both (J 

 and $ the surface is thickly covered with large punctures, 

 the interspaces bcinp^ filled with smaller ))unctures, so that 

 the whole has a ron<;h and slightly dull appearance. These 

 punctures are so tiiickly placed that they produce irregular 

 depressions, the tendency being for these depressions to lie 

 across the prosternum in the wider part. 



H. falvicollis is not, so fi\r as I know, a British species, and 

 I have only become acquainted with it because Edwards 

 included it in his paper, and I therefore obtained specimens 

 from two or three sources on the continent. It is really a 

 very distinct species, not likely to be confused with any of 

 ours. The prosternum is quite smooth, shining, and flat, 

 except in the extreme anterior region, where there is a short 

 groove (tvpe 1). There is no fine puncturation, and the 

 large scattered punctures are not so large as in other species. 

 This description is drawn up after examination of between 

 twelve and twenty specimens, so that, perhaps, there are 

 variations as in our own species. When I received these 

 specimens I also received several labelled '^fulvicoUis, var. 



H. farcatus of Seidlitz is, however, a quite distinct species, 

 as will be shown later on. The prosternum is of type 4 ; 

 the lateral ridges are well marked, and the central region is 

 slightly convex, so that a depressed line runs down each sid*^ 

 below the lateral ridge. A. few larger punctures are scattered 

 about, and in the depressed margins there is a faint trace of 

 fine puncturation. 



In all the British species there is in the metnsternum, just 

 behind where it touches the prosternum, a shallow j)it, but in 

 both H. fidvicoUis and H. Jnrcatus there is a slightly raised 

 median ridge separating two pits {vide Pi. VII, fig, 10). 



The Pbotiioracic Stri^ and Sculpture of the Thorax. 



In all the species of the " ruficolUs " group there is, at the 

 base of the thorax on either side, about halfway between the 

 side-border and the median line, a small stria, the length and 

 form of which, associated with the sculpture of the interstitial 

 space, has been used to assist in distinguishing the different 

 species. Gerhardt, in his fuller diagnoses of the species, 

 says of //. rujicollis " thorace ... ad basin utrinque im- 

 presso," and of //. heydpni and immaculatus "ad basin 

 utrinque delucide impresso,^' while of //. fu/vicollis he says 

 '' ad basin utrinque lineola iinpresso," Wehncke says that 



