1918.] F. H. Gravely : Passalidae of the World. 61 



mesothorax is normal. There are a number of coarse punctures on the posterior 

 intermediate areas of the metasternum, the lateral areas being linear, smooth and hairless. 

 The anterior intermediate areas of the metasternum, and the shoulders of the elytra with 

 the anterior parts of the epipleura, are covered with hair-bearing punctures, the shoulders 

 of the elytra being densely hairy. All the grooves of the elytra are distinctly punctured, 

 the lateral scarcely more strongly than the dorsal. The middle and hind tibiae are 

 without distinct spines. 



Passalus quadricollis, Eschscholtz. 



Fig. VII, 17, p. 53. 



Passalus quadricollis, Eschscholtz, 1892, pp. 21-22. 

 Phoroneus quadricollis, Kaup, 1871, p. 102. 



Two specimens from Brazil, one of them in the collection of M. Guy Babault of Paris. 

 Length 33 mm. 



The central tubercle is set further back than in P. mucronatus and the free apex extends 

 forwards horizontally at right angles to the massive base by which it is raised high above 

 the large and coarsely rugose frontal area. The frontal ridges and inner tubercles are more 

 strongly developed than in P. mucronatus. The pronotum resembles that of P. mucronatus, 

 except that the punctures are confined to the scars and marginal grooves, those in the 

 former being of very large size. The mesosternal scars are matt, but are not depressed. 

 The inner angles of the posterior intermediate areas of the metasternum are marked 

 with very large and more or less coalescent punctures ; the anterior intermediate and lateral 

 areas of the metasternum and the shoulders of the elytra are covered with hair-bearing 

 punctures. The grooves of the elytra are marked with shallow punctures which are very 

 broad in the lateral grooves. The middle tibiae bear a stout spine on the outer side. 



Passalus occipitalis, Eschscholtz, 1829. 

 Fig. VII, 18, p. 53. 

 Passalus occipitalis, Eschscholtz, 1829, p. 21. 



One specimen 33 mm. long. Locality not recorded. 



This species is closely related to the last, but the massive central tubercle is set still 

 further back and has no free horizontal apex. The frontal ridges diverge at about a right 

 angle and then bend forwards and run parallel to one another as far as the inner tubercles, 

 which are situated not very far behind the outer. The anterior margin of the head, though 

 straight as a whole, is a little irregular ; it is not distinctly notched in our specimen i 1 the 

 whole anterior part of the frontal area is thickly covered with large punctures. The whole 

 of the thorax resembles that of P. quadricollis, except that the mesothoracic scars are to 

 some extent depressed, and the punctures in the inner angles of the posterior intermediate 

 areas of the metasternum are much smaller. The elytra are punctured as in that species 

 in the lateral grooves, more finely or not at all in the dorsal ones. The legs resemble 

 i}hose of that species. 



1 See also, however. Arrow, 1907, pp. 459-460. 



