Lonrjicorn Genus Glenea, Neiom. 475 



two — viz., G. nigromaculata^ Thorns., and Q. glechoma, Pasc. 

 — are altogether exceptional in the character of their tarsal 

 claws, and, moreover, ditFer from true species of Glenea in not 

 having distinct lateral carinte on the elytra : for the reception 

 of these two species I have thought it desirable to found a 

 new genus, Heteroghnea, which is further characterized 

 below. ' 



Leaving out of consideration the four species last men- 

 tioned, we may sum up our observations on the tarsal claws 

 of Glenea as follows : — 



In the female all the claws are simple. In the male 

 either (1) all the claws are simple ; (2) all the claws are 

 appendiculate at the base ; (3) the anterior claw of all the tarsi 

 is appendiculate at the base ; (4) the anterior claw of the 

 anterior and middle tarsi is toothed at the base; (5) the 

 anterior claw of the anterior tarsi only is toothed at the base ; 

 or (6) the anterior claw of the middle tarsi only is toothed 

 at the base. 



N.B. — The terms anterior and posterior as applied to the 

 claws in this note and elsewhere in this paper refer to the 

 position of tlie claws when the tarsus stands in a direction 

 at right angles to the axis of the body. Inner and outer are 

 the terms usually employed by entomologists, but seem to 

 me objectionable, inasmuch as the inner claw of the front 

 legs corresponds morphologically with the outer claw of the 

 hind legs. 



2. On Sexual Dimorphism in the Genus Glenea. 



There is little or no difference in coloration between the 

 sexes in the great majority of the species of Glenea, what- 

 ever difference of this kind there may be consisting chiefly 

 of a greater depth or intensity of colour in the female. In 

 certain species, liowever, the difference in colour or marking 

 is so pronounced that in more than one instance the two 

 sexes have been regarded as distinct species in spite of clear 

 evidence in favour of the contrary view. 



The most interesting and best marked examples of this 

 sexual dimorphism are afforded by Glenea fulvomaculata, 

 Thorns., and a few closely allied species. In the female of 

 fulvomaculata the upperside of the body is of a deep dull 

 black or dark brown colour, marked on the pronotum with 

 three rather broad orange-tawny stripes, and on each elytron 

 with two large and somewhat quadrate spots of the same 

 colour — one spot placed in front of the middle and connected 



34* 



