180 MANDIBULATA. COLEOPTERA. 



The two following insects differ so essentially from those which are ahove in- 

 cluded in the genus Badister, and from all the other Harpalidfe, that I should 

 be departing from those principles which have guided me in the generic dis- 

 tribution of the geodephaga were I to associate them with that genus, which 

 Sturm, De Jean, and others appear to do ; I shall therefore form them into a 

 genus by the name Trimorphus (t^s's tria, i^o^(pyi forma, having the appear- 

 ance of three genera), from their close resemblance to the Trechi on the one 

 hand, and to the Badisteres and Dromii on the other. 



Genus XXVI, b. — Trimorphus mihi. 



Palpi elongate: external maxillary with the terminal joint considerably longer 

 than the preceding, subfusiform-truncate, the third slightly clavate ; internal 

 with the last joint truncate; labial with the terminal joint very large, sub- 

 fusiform-ovate, sUghtly truncate : labrum membranaceous, entire : mandibles 

 bent, obtuse, obsoletely emarginate at the tip : mentum very deeply emarginate, 

 the notch simple. Antennae with the two basal joints naked: head rounded, 

 depressed anteriorly : thorax cordate, truncate, emarginate anteriorly : elytra 

 entire, rounded at the apex, scarcely so long as the abdomen : wings two : 

 anterior tarsi of the male with three dUated joints. 



This genus may be known from Badister by the proportionate length of the ter- 

 minal joints of the maxillary palpi, by their form and truncation : it also differs 

 in the structure of the labrum, and by the greater apparent depth of the notch 

 of the mentum ; the body is more elongate and depressed ; and the thorax 

 more distinctly heart-shaped *. 



Sp. 1. Trimorphus scapularis. Niger, thoracis margine laterali, pedibusque 

 pallidis, elytris nigris, margine, suturd maculdgue quadratd hum,erali pallidis. 

 (Long. corp. 2^ lin.) 



Ca. dorsiger. Duftschmid, ii. 151.'' — Tri. scapularis. Steph. Catal. Appendix. 



Rather depressed, shining black : head large, smooth, with an impression on' 

 each side near the eyes, and two minute dots on the forehead : thorax sub- 

 quadrate, attenuated posteriorly, the hinder angles rounded, with a deep central 

 channel, and a shghtly wrinkled depression on each side near the posterior 

 angles, in which is an impressed stria ; the lateral margin is more or less pale, 

 especially towards the base of the thorax : elytra black, striated, the striae 



* The tabular view, in page 66, of the genera Licinus and Badister having been 

 in part accidentally transposed, it is here reprinted, with the addition of the genus 

 Trimorphus. 



A. Mentum antice emarginatum ; dente medio nullo. 



f ovale ; maxillarcs 

 fobtusae: Pulpi la- cxternl articulo 

 6Jafc,5 articulo ul- | ultimo tertio < 

 timo . . . -j 



"breviore: 26. Badister. 



Mandibuloe -{ I Llongiore: 20, b. Trimorphus. 



! 1 



I (^securiformc : . .27- LiciNUS. 



{acutcE: ... . . . . 28. REMBVS. 



