ART. 23. BLISTER BEETLE TRICRANIA PARKER AND BOVING. 31 



The first description of the present species Tricrania sanguini- 

 pennis is by S'Aj, who treats it under the name of Iloria sanguini- 

 pennis. It is as follows : ^ 



Body black; elytra sanguineous, iinuiaculate. Inhabits Pennsylvania. 

 Body short, robust, deep black, .^abrous, with dense punctures; head lobate 

 at the basal angles, with a slightly elevated longitudinal, glabrous line on the 

 front ; antennae iiupunctured ; third joint as large or larger than the first ; 

 terminal joint acuniinatetl from its middle; mandibles glabrous and with the 

 lialpi impunctured ; thorax transverse-quadrate, very obtusely rounded behind ; 

 scutel conspicuous, rounded behind, punctures more minute than those of the 

 thorax; elytra very flexible, sanguineous, immaculate; feet punctured (nails 

 denticulated on the middle, tip, and base simple).'" Length more than two- 

 fifths of an inch. 



SYNOPSIS OF THE TPiIBES AND GENEKA OF SUBFAMILY 

 NEMOGNATHINAE." 



The following synopsis, given in the form of a key, summarizes 

 the contents of the above-given descriptions of the egg, larval, and pu- 

 pal stages of Tiicrania and the conmients on the corresponding stages 

 of other genera of Nemognathinae. The key is based, partly on 

 the present authors' personal examinations of the North American 

 and some of the European species, partly on the texts and figures 

 of other authors, but especially on Cros' very important publications 

 about European and African forms. 



The sequence in which the tribes and genera are arranged in the 

 key expresses our conception of their natural grouping. 



CHARACTERIZATIOX OF SUBFAMILY NEMOGNATHINAE. 



The subfamily N^eniof/nathinae is differentiated from the other members of 

 the family Meloidne by the following characterization: 



FiKST instab: Head subtriangular or subcordate, labrum fused with head 

 capsule into a nasale which is hollowed longitudinally on ventral surface. 

 Epicranial margins behind ends of cardines. parallel or posteriorly converging. 

 Gular area distinct. 



Ocelli two on each side, !-x)metimes close together. 



Mandibles not projecting in front of labrum ; axis between fossa and condyle 

 of mandible, horizontal and mandible consequently moving in a vertical plane ; 

 with from 2 to 8 distinct teeth. 



Labial palp two-jointed. 



Thorax about of the same size as abdomen. 



Tarsus, except in Stenoria in which spathnlate, slender and conico-falcate, 

 with one or two either small and fine, or long and strong setae laterally at base. 



ojourn. Acad. Nat. Sci., Philadelphia, vol. 3. 1823, p. 279. 



^o Say's description of the claws is not correct : compare the generic description above. 



i'^ The term ''XcmoprinHiinac " takes here the place of the more commonly used "Zoni- 

 tiiiae," which has long been applied to a subfamily of Mollusca ; see T. D. A. Cockerell, 

 Knt. News, vol. 21, 1910. 



