SOEANITS. 19 



B. Antennal leaflets short. 



SOEANUS. 



Soranus, Kaup, Monogr. der Passal. p. 107. 



Kaup enumerates four Mexican and one Nicaraguan species under this genus. Its 

 composition is, however, not satisfactory, as it contains species with moderately long 

 and species with very short antennal leaflets, the former of which have a convex and 

 impunctate metasternum and obtuse anterior thoracic angles, and the latter the com- 

 mencement of a discal plate on the metasternum, with its patch of coarse punctures on 

 its posterior sides, and somewhat produced thoracic angles. They are united only in 

 the form of the carina? and tubercles of the head, the horn of the vertex being flanked 

 by broad tubercles, which are vertical in front. Soranus rectieornis is closely allied to 

 Popilius. 



1. Soranus haagi. 



Passalus haagii, Kaup, Harold's Col. Hefte^v. p. 21. 

 Soranus haagii, Kaup, Monogr. der Passal. p. 107 1 . 



Hab. Mexico 1 (coll. Haag). 



Unknown to me. If, as implied by Kaup originally referring this species to the 

 genus Passalus, the antennal leaflets are very short, his genus Soranus should be 

 limited to those species which possess that character, the others, or at any rate S. recti- 

 eornis, being separated from it. To follow this course without examining his S. haagi 

 seems, however, unadvisable. 



2. Soranus tropicus. 



Passalus tropicus, Percheron, Monogr. des Passales, p. 79, t. 7. fig. 4; Truqui, Rev. & Mag. ZooL 



1857, p. 312 \ 

 Soranus tropicus, Kaup, Monogr. der Passal. p. 109 2 . 



Hab. Mexico x 2 , Jacale, Puebla (Salle), Jalapa (Edge). 



In this species the antennal leaflets are very short ; the anterior angles of the thorax 

 rectangular with the apex blunted ; the metasternum without distinct discal plate, but 

 with a slightly depressed patch of coarse punctures on each side. 



3. Soranus wagneri. 



Passalus wagneri, Kaup, Harold's Col. Hefte, iv. p. 30 1 . 

 Soranus wagneri, Kaup, Monogr. der Passal. p. 108, t. 7. f. 2 \ 



Sab. Guatemala * 2 ; Nicaragua, Chontales (Janson). 



In S. wagneri the antennal leaflets are very short, the anterior angles of the thorax 



DD2 



