374 MEMOIRS ON THE COLEOPTERA 



with the type but is nearly deep black in color, with slightly dia- 

 phanous thoracic sides, showing that the type is probably immature. 

 After carefully reading the description of pedicellaris Mollenkamp 

 (Intern. Ent. Zeit., V, 1911, p. 302), described as from California, 

 I am unable to find any notable differences between it and thoracicus 

 Csy. ; it is highly probable, therefore, that it is a synonym of that 

 species. 



PASSALID^ 



Proculus Kaup. 



In describing Proculus magister (Ann. N. Y. Acad., IX, 1897, 

 p. 641), I compared it with a species at that time supposed to be 

 mneszechi Kaup, but which, because of the high basal process of 

 the mandibles, proves to be different and much closer to burmeisteri 

 Kuw. This species may be described as follows: 



* Proculus mandibularis n. sp. Form shorter than in magister, similarly 

 convex and very shining throughout; mandibles with a very high slender 

 and almost perpendicular dorsal process almost at the extreme base; 

 small frontal tubercles mutually less separated than either from the 

 ends of the strong oblique obtuse lateral ridges, the lateral anteriorly 

 margined depressions distinct; central tubercle minute, isolated; ante- 

 ocular lateral spur strong, subacute; labrum feebly and broadly sinuate 

 at tip; prothorax as in magister, impunctate, the lateral irregular de- 

 pression well developed; elytra oval', equal in width to the prothorax, 

 with moderate and rather feebly impressed but distinctly and closely 

 punctate striae throughout, the intervals everywhere almost flat; flanks 

 glabrous except anteriorly; middle tibiae with two or three small medial 

 spines externally, the posterior with one to three. Length 66.0 mm.; 

 width 26.0; width of head 20.0 mm.; length of prothorax 19.0, of elytra 

 36.0 mm. Honduras (San Pedro Sula). 



The only form with which this can be compared is burmeisteri 

 Kuw., and there the strial intervals of the elytra are particularly 

 dwelt upon as being notably convex. In magister the mandibular 

 dorsal process is more gradually formed, less elevated and ends at 

 basal two-fifths; it is more prominent, however, than in mneszechi, 

 in which species the anterior thoracic angles are better defined, 

 the elytral intervals flatter and the ends of the anterior tibiae more 

 finely and obliquely incised than in magister. 



* Proculus densipennis n. sp. Form narrower, convex, shining, the 

 elytra very densely opaque, with feebly impressed, very obscurely punc- 

 tate striae and nearly flat intervals; head large, with acutely porrect 



