lOl^l F. II. Ckavkia- : Pussalidae of the World. 59^ 



Passalus spinosus (Kuweit). 



Rhitdncnnthopus incertm, Kuwfrt. IH'Jb. p. IK'. 



Two .sperimens from Chiriciui, Panama, 203 nun. loii^'. A .somewhat more lol.ust 

 insect than tlio preceding. 



Tin- Irontal ridges are straight and meet in a riglil angle ; the inner tubercles are situated 

 ai)out half way from the central to the outer tubercles and there is a pair of small secondary 

 tubercles between tlicni an<l the latter ; the anterior margin of the head is broadly notched 

 in the miildle : the anterior i)art of the frontal area is moderately strongly punctared. The 

 pronotum resembles that of P. incerlns in shape, but is only punctured in and close to the 

 scars and in the marginal grooves, whose anterior ends are smaller. The me.sothorax 

 lesembles that of P. incertus. The metasternum differs from that of P. incerlns only in 

 having the lateral areas somewhat broader and less smooth behind. The elytra are 

 hairless ; their four dorsal grooves are about as strongly punctured as in P. incertus : the 

 next four are marked with very large transverse punctures, the transverse ridges between 

 which tend to become obsolete i)ehind. In the two remaining grooves the.se ridges 

 are ob.solete throughout, and at the extreme po.sterior end the longitudinal ridges become 

 obsolete also, the remaining surface being matt. The nuddle and hind tibiae are armed 

 with three or foui" strong spines. 



Passalus spinipes, n. sp. 

 Fi-. Vll. 11 p. ■>■■'>. 

 One specimen from Nicaragua, 22-7 mm. long. 



This species is closely allied to P. spinosus, but the inner tubercles and the secondary 

 tubercles in front of them are less pronounced, the sides of the pronotum bear a longitudinal 

 band of punctures above the scars, the posterior intermediate areas of the metasternum are 

 less exten.sively punctured, the lateral areas are extremely narrow throughout, the 

 punctures in the grooves of the elytra are finer, those in the lateral grooves though 

 moderately coarse not being transverse. 



Passalus spiniger (Bates). 



Jihodonitithoiiiis spiniger. Hates, iSSti. j.)). I.-)-!!), pi. 1. figs. 1G-16«. 



Une .specimen from Columbia, 22 mm. long. 



This species is very like the last two. l)Ut the anterior margin of the heatl is less broadly 

 and perhaps more .sharply notched, the frontal area is .scarcely as long or as distinctly 

 punctured, there are no secondary tubercles between the inner and outer tubercles, the 

 sides of the jjronotum are more coar.sely and extensively punctured, the lateral areas of the 

 metasternum are intermediate between the two in width, and the puncturing of the grooves 

 of the elvtra is somewhat coarser than in /'. spinosus above and less coarse (scarcely if at all 

 transver.se) at the sides, all the transverse ridges l)cing distinct ami broadly elevated as 



in P. spinipes. 



i2 



