400 Descriptive Catalogue [1898. 



Female : Second dorsal segment, instead of being sharply 

 mucronate as in the type, is simply provided in the middle of the 

 posterior margin with a blunt and faint tubercle. Length 1-50-1-60. 



One female specimen is much smaller (length 1-35 mm.), and 

 altogether piceous ; the body is more elongate than is generally the 

 case in the females ; the antennae are rufous, shorter and thicker, 

 and there is a very faint and blunt tubercle at the apex of the 

 second dorsal segment. 



There are thus in this species two different forms of the male and 

 three different forms of the female, which are nothing else but local 

 varieties more or less developed. 



R. achilUs type, male : excavations of the ventral segments of the 

 abdomen very deep, Muizenberg and Stellenbosch. 



B. achillis type, female : second dorsal segment of the abdomen 

 sharply mucronate. Found exclusively at Stellenbosch. 



Var. hiviucromata, female : first dorsal segment of the abdomen 

 sometimes with a very faint, sharp tubercle, second and third dorsal 

 segments sharply spinose. Found at Muizenberg and Cape Town, 

 together with the male type. 



Var. inferior, female and male : size a trifle smaller, antennae 

 rufous ; ventral segments of the abdomen in the male with super- 

 ficial impressions ; the second dorsal segment in the female having 

 simply a blunt and small tubercle. 



Hah. Cape Colony (Port Elizabeth). 



Such variations are very interesting, more especially the presence 

 of two different forms of females with one form of male. 



Eeichenbachia zambesiana, Eaffr., 

 Meichenbachia decipiens, Eaffray, 

 Catal., p. 92. 



The name B. decipiens having been previously given to a species 

 of the same genus, I propose to change it in Beichenhachia Zam- 

 besiana. 



Eeichenbachia sulcicornis, Eaffray, 

 Catal., p. 90. 



This species varies to a certain extent in size and in colour. 

 The colour may be ferruginous or chestnut, with the last joints of 

 the antennae more or less piceous, or piceous with the elytra red 



