1918.] F. H. Gravely : Passalidae of the World. 35 



punctured and hairy below. The mesosternum is dull, unpunctured and hairless all over. 

 The metasternum is punctured and hairy in the lateral and anterior intermediate areas 

 only ; the lateral areas are slightly broadened behind. The abdominal sterna are smooth 

 and glossy, except the first pair of scars which are somewhat rough. The elytra are 

 sparsely hairy between the shoulders ; their grooves are somewhat strongly punctured- 

 The middle tibiae each have a small spine before the end. 



Genus VETURIUS, Kaup, 187 1, p. no. 

 Inch Pleiirostylus, Kaup, 187 1 (see Arrow, 1907, pp. 449-450). 

 Type, Passalus heydeni, Kaup, 1868&, p. 27. 



Veturius sinuatosulcatus, n. sp. 



Fig. V, 3 & 5. 



One specimen from Chaco, 40 mm. long. 



The labrum is lightly concave in front, lightly convex at the sides. The mandibles 

 (which are somewhat worn) appear to have been very like those of Arrox agassizi, but the 

 two lowest terminal teeth have been fused, probably at the base only, and somewhat widely 

 separated from the uppermost terminal tooth, especially on the left side. The head is smooth, 

 with a strongly elevated central tubercle flanked by straight and somewhat f orwardly directed 

 parietal ridges. The central tubercle unites in front with a slender, finely pointed, V-shaped 

 ridge or pair of ridges from which the obsolete frontal ridges arise at an obtuse angle to each 

 other. The inner tubercles are well developed, but the frontal ridges do not reach 

 them. 



The sides of the pronotum are strongly concave, but are overhung by the strongly 

 convex upper borders of the marginal grooves. The anterior margin is practically straight, 

 but is bordered by a strongly sinuous marginal groove which, though much narrowed near 

 the middle line, is scarcely broken. The pronotum is highly convex behind the median 

 curve of this groove, which is enlarged on either side of the convexity. At the sides the 

 groove is broad behind as well as in front, not narrow behind as in V. sinuatocollis, Kuwert. 

 The median groove is deeply impressed and practically complete. 



The scutellum is coarsely punctured in the anterior angles and on either side of all but 

 the extreme posterior part of the middle line, bands meeting in the posterior angle to form 

 an 4, -shaped figure being left unpunctured. The mesothoracic episterna are glossy and 

 punctured above and along the anterior margin, matt and unpunctured behind. The 

 mesosternum bears matt bands in the middle line and along the sides, meeting in a broad 

 matt area in the anterior angle to form an T -shaped figure. Between these bands it is 

 glossy. It is unpunctured and hairless throughout. The metasternum is punctured and 

 hairy only in the anterior parts of the anterior intermediate areas and in the lateral areas ; 

 the lateral areas are moderately broad behind. The abdominal sterna are glossy. The 

 grooves of the elytra are distinctly punctured, especially laterally ; the shoulders are 

 without hair. There is a strong spine a little beyond the middle of the middle and hind 



tibiae. 



F 2 



