REVISION OF ELEODIINI BLAISDELL. 9 



emargination, the latter receiving the base and obliquely truncate 

 basal angles of the epistoma, forming the more or less evident frontal 

 suture, the latter sometimes apparently sinuate at middle. 



Epistoma transverse, surface more or less plane to feebly convex; 

 base embraced by the anterior margin of the frons (see Plate 8, fig. 

 1) ; sides straiglit and convergent anteriorly, continuing the sides 

 of the frons and forming therewith the fronto-epistomal border; 

 anterior margin more or less sinuate, angles rather narrowly rounded. 



Tempora small, and not in the least prominent, sloping from the 

 posterior margins of the eyes, and feebly convex, passing evenly into 

 the frons above and the geni^e beneath and limited posteriorly by tlie 

 transverse impression. 



Genm not prominent laterally, surfaces feebly convex, limited inter- 

 nally by the gular sutures. Each anterior margin is irregular, pre- 

 senting for examination two angles — a superior or frontal, and an 

 inferior or mental; three emarginations — a superior, nuindibular, 

 and buccal; tv jjrocesses — the mandibular and buccal. (Plate 8, 



fig. 15.) 



The superior or frontal angle joins the inferior margin of the 

 antennal fossa in front of the inferior fourth of the eye, and separated 

 from the mandibular process which lies below it by a very short and 

 somewhat oblique, shallow apical or superior emargination, the 

 ventral margin of which is more or less beveled; the mandibular 

 process is short and obtuse, and when the superior emargination is 

 obsolete, scarcely recognizable as a distinct part near the superior 

 angle; the mandibular emargination is a small but well marked 

 reentrant margin between the mandibular process above and buccal 

 process below, its curvature is somewhat oblique superiorly where it 

 forms the ventral edge of the mandibular process; the buccal ])rocess 

 is anteriorly prominent, subacute, but not produced, forming the 

 abrupt and external boundary of the deep and evenly rounded buccal 

 emargination, which terminates internally at the mental angle of the 

 gular peduncle. That jiart of the anterior margin bounded above 

 by the apical angle and the buccal process below is the mandibular 

 portion, while that part between the buccal process above or exter- 

 nally and the mental angle of the gular peduncle ventrally and 

 internally is the l)uccal portion. The second joint of the maxillary 

 palpus rests in the mandibular emargination when extended against 

 the side of the head. The numdibular portion is opposed to the base 

 of the mandible, and the buccal portion at the internal margin of the 

 emargination gives attachment to the cardo of the maxilla and forms 

 the posterior boundary of the buccal fissure. 



The buccal process on its internal surface has a small glenoid 

 cavity by which it articulates with the small globular and somewhat 

 prominent condyle of the mandible. 



