1918.] F. H. Gravely : Passalidae of the World. 27 



Popilius marginatus (Percheron). 

 Fig. IV, 6, p. 24. 

 Passah(s marginatus, Percheron, 1835, pp. 89-90, pi. vii, fig. 1. 



Three specimens from Farinas, Bolivia. Length 21-22 mm. 



Popilius marginatus is of about the same size as Oileoides subrecticornis or a little 

 smaller, but it has longer antennal lamellae, its straight clypeus is less extensive 

 antero-posteriorly and consequently less flat, there is a strong median keel or pair of keels 

 between the small central tubercle and the obsolete frontal ridges, the pronotum is more 

 thickly punctured above the scars and its median groove is complete, the scutellum 

 is strongly punctured at least near the middle line in front. The metasternum resembles 

 that of P. recticornis and other species of Popilius ; it may have a few punctures in the 

 posterior intermediate areas. The abdominal sterna are punctured in the angles of the 

 scars. In other respects P. marginatus resembles 0. subrecticornis. 



Popilius amazonicus, n. sp. 



Fig. IV, 7, p. 24. 



One specimen from the Amazon, Peru. Length 20 mm. 



P. amazonicus resembles P. marginatus in general appearance, but the tubercles and 

 ridges of the head resemble rather those of P. intergeneus, the pronotum is very sparsely 

 punctured near the scars, the pointed posterior extremity of the prosternum is very slender, 

 and the scars of the abdominal sterna are more extensively punctured. 



Popilius intergeneus (Bates). 



Fig. IV, 8, p. 24. 

 Soranus (?) intergeneus, Bates, 1886, p. 21. 



Numerous specimens from Guatemala. I am indebted to Mr. Arrow for their identi- 

 fication by comparison with Bates' type. Length 2o - o-2i - 5 mm. 



This species is intermediate in size between the two preceding. From P. marginatus 

 it differs in having the antennal lamellae short, the anterior margin of the clypeus slightly 

 convex and often indented in the middle line, the frontal ridges stronger and on an average 

 more directly united with the central tubercle, the pronotum punctured in the anterior 

 angles as well as above the scars, the prosternum truncate instead of pointed behind, the 

 mesothoracic episterna uniformly glossy except for an unpunctured matt oval patch a little 

 below and in front of the unpunctured posterior angles, the scars of the abdominal sterna 

 more extensively punctured and the grooves of the elytra more strongly punctured. 



Popilius guatemalae n. sp. 



Fig. IV, 9, p. 24. 

 One specimen from Guatemala. Length 28*5 mm. 



This species differs from P. intergeneus in its much larger size, straight margined 

 clypeus, smaller and more arcuate frontal ridges, grooved parietal ridges, incomplete 

 pronotal median groove, much less extensively punctured pronotum (the punctures being 

 confined to the neighbourhood of the scars), pointed posterior end of prosternum, almost 



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