12 MEMOIRS ON THE COLEOPTERA 



and internal offsets is manifestly of the blanda type, but there is 

 no other species having the sutural white vitta which here expands 

 greatly toward base. The short broad hind body recalls that of 

 pamphila, but the very pallid legs and antennae are peculiar and 

 the tarsi are rather short; the head is hairy and the legs are un- 

 usually pubescent throughout. The known components of the 

 group are lepida Dej. and insomnis*. 



24 Gratiosa group. 



The general outline here changes to the elongate form characteriz- 

 ing the marginata group and sexual modifications of the elytral 

 apices, so greatly developed there, become apparent here also, but 

 the scheme of ornamentation is different; it is peculiar to the group 

 but betrays some affiliation with the proetextata type. The head is 

 very densely hairy and the legs are very long and slender and much 

 more pubescent than in any other of the neighboring groups, except 

 the preceding. The only three known species are gratiosa Guer., 

 hirtilabris Lee. and smythi E. D. Harris, of the southern Atlantic 

 and Gulf regions. 



25 Marginata group. 



This is one of the larger of the American groups of the genus, 

 and as here organized comprises several of the smaller groups 

 proposed by Mr. Leng. There is evidently a strong bond of 

 affinity between all of the species as shown especially by the general 

 habitus, which is similar throughout. The head is hairy, the legs 

 long but not pubescent, the elytra elongate and the modification 

 of the elytral apices in the female always evident and sometimes 

 very radical, either in the abrupt sinuation of the oblique apical 

 edges as in cuprascens, or of the apices themselves as in marginata; 

 in blanda these modifications are barely traceable, but this species is 

 distinguished by a formation of the mandibles that does not seem 

 to have been referred to; they are very long and slender, with the 

 teeth grouped nearer the base than usual. This group will include 

 marginata Fabr., blanda Dej., hamata Brulle, cuprascens, macra, 

 wapleri, nevadica and sperata Lee., puritana Horn, inquisitor Csy., 

 knausi Leng, marutha Dow and also mercurialis*, amnicola* and 

 mundula*. For many years I have had an example of marutha 



