180 PROCEEDINGS OF THE ACADEMY OF [Feb., 



fendu, mais en realite seiilement partage par un pli rentrant, en 

 general appreciable seulement sous la forme d'un sillon longitudinal. 

 (Le segment rappelant par son apparence le dernier segment ventral 

 des Periplanetiens.) 



"2° Heterogamia (sensu latiore). — cJ^d^. Tarses en general munis 

 d'un petit aroliimi. — 9 ? . Le dernier segment ventral non comprime 

 en bee, mais plat, avec le milieu renfle en bosse arrondie non partag^e. 

 Le corps aile comme chez les Homoeogamia, ou aptere de forme 

 ovale-orbiculaire ou ovoide, cilie sur ses bords, au moins le long du 

 pronotum." 



In the same year (1893) that the above appeared, but evidently 

 having priority of publication, Brunner described a species (Horn, 

 capucina) from Burma, which possesses a female with well-developed 

 tegmina. The genus is placed by the same author in the Corydidce. 

 to which the whole " Heterogamides '' is added. In 18P4, Saussure 

 and Zehntner, in the Biologia Centrali- America, placed Homaogajnia 

 as a member of the subfamily Corydinoe. The inference drawn from 

 some statements in this work is that it was prepared before the 

 Revision . . . des Heterogamiens, but did not appear until later. 



The two Old World species mentioned above have both been elimi- 

 nated from Homoeogamia, sineiisis being removed to Polyphaga by 

 Dohra {Stettin Ent. Zeit., XLIX, p. 132, 1888) and capucina placed 

 in Dyscologamia by Saussure (Revue Suisse ZooL, I, fasc. 2, p. 301. 

 1893). 



Remarks. — After a study of the available specimens, and an exami- 

 nation of the numerous statements made in the works mentioned in 

 the preceding historical sketch, the conclusion is reached that Homoeo- 

 gamia, as defined by Saussure, in 1893, is a tenable genus, though 

 closely allied to Polyphaga Brulle (Heterogamia Burm. et auct.). 



The two South American species, which are known only from the 

 nymphs, have not been identified since the original descriptions, 

 and as no material in this genus from that region is available, nothing 

 critical has been done with them. The original descriptions of these 

 species have been placed at the end of the article with the diagnosis 

 of Polyphaga cequalis Walker, which probably was based on some 

 member of this genus. 



Key to the subgenera (based on the males). 



A. — Supra-anal plate of male bilobate; median and posterior tibia 

 with six apical spurs; vertex rounded. 

 B. — Marginal field of tegmina broad ; tarsi comparatively robust, 

 metatarsi of median limbs about half as long as the tibiae, 



Homoeogamia s. s. 



