1918.] F. H. Gravely : Passalidae of the World. 55 



posterior intermediate areas of the metasternum are more extensively punctured than 

 in P. latifrons, which the present species resembles in other respects. 



Passalus convexus, Schönherr. 

 Passalus convexus, Schönherr, 1817, p. 333, and appendix pp. 142-143. 



Ten specimens from Cumbase (Peru), Tejuca, Upper Amazon, and Amazonas. 

 Length 38-0-43-7 mm. 



This species, like the last, is closely allied to Passalus latifrons, from which it differs 



only in its larger size, in not having the frontal ridges continued beyond the inner tubercles, 



in having less prominent outer tubercles, and in having the anterior angles of the pronotum 



more or less rounded. 



Passalus quitensis (Kaup). 



Fig. VII, 7, p. 53. 



Procidejus quitensis, Kaup, 1871, pp. 63-64. 



Described from a cotype from Quito, lent by the British Museum. Length 32 mm. 



In addition to its rounded pronotum and fused and rounded elytra Passalus quitensis 

 differs from P. convexus in having the inner tubercles directly behind and much nearer 

 to the outer tubercles, in having curved instead of straight frontal ridges, in having well 

 developed mesosternal scars, and in having the posterior intermediate areas of the metas- 

 ternum strongly and extensively punctured. 



Passalus affinis, Percheron. 

 Passalus affinis, Percheron, 1835, pp. 72-73, pi. v, fig. 5. 



Several specimens from Cuba, three from St. Domingo and one from Haiti. Length 

 37-5-42-0 mm. Relative breadth very variable. 



The frontal area resembles that of P. quitensis, but is more closely and extensively 

 punctured in front, while the inner and outer tubercles are contiguous, together forming 

 a pair of more or less oblique ridges on the anterior margin of the head, as in P. interruptus, 

 etc. The mesosternal scars are well developed ; the posterior intermediate areas of 

 the metasternum are coarsely and extensively punctured. The lateral areas of the 

 metasternum, the epipleura and the shoulders of the elytra are punctured and hairy. In 

 other respects this species resembles P. convexus. 



Passalus catharinae, n. sp. 

 Fig. VII, 8, p. 53. 



One specimen from Santa Catharina and one from Chaco. Length 31-33 mm. 



The head is very like that of P. affinis, but the frontal ridges and all the tubercles are 

 more strongly elevated, the broad and rectangular or obtuse apex of the central tubercle 

 slightly overhanging the frontal area, which is more or less sparsely punctured. There 

 are a few strong punctures above the pronotal scars. The posterior intermediate areas 

 of the metasternum bear a few coalescent punctures along the inner margin ; the lateral 

 areas are linear, hairless and unpunctured. The elytra resemble those of P. affinis except 

 that the dorsal ridges are less and the lateral more coarsely punctured, the three grooves 



