382 THE CANADIAN ENTOMOLOGIST 



since the time of Latreille, and in the case of Lygaus makes that 

 genus synonymous with Graptolomus Stal and Eulygceus Reuter. 

 Most European entomologists accept Laporte's indication of 

 familiaris Fabr. as type of Lygceus or follow Kirkaldy in consider- 

 ing LygcBus a Coreid genus with valgus as type, but I think the 

 solution here given much more reasonable and better in every way. 



Genus Artheneis Spin. — Dr. Horvath (Ann. Mus. Nat. Hung., 

 VIII, p. 11, 1910) has shown conclusively that the type of this 

 genus should be foveolata Spin. Kirkaldy had no reason to name 

 cymoides as type and thus to make this genus supercede Nysius 

 of Dallas. 



Genus Perigenes Dist. — I have examined a long series of 

 Perigenes constrictus Say from the Northern and Middle States, 

 and have been unable to detect a distinct lunate vitta on the venter 

 of any, although there is a structural fullness at that point which 

 in rubbed specimens has somewhat the aspect of a vitta. The 

 southern specimens sent to me as Ligyrocoris constrictus Say have 

 proved to be abdominalis Guer. Say's species as represented in 

 the collection of the Boston Society of Natural History is an un- 

 doubted Perigenes. It is questionable whether this lunate vitta 

 should be considered as a generic character, as genus -Ligyrocoris 

 as now constituted contains species of at least four genera: Sphce- 

 robius, Herceus, Orthcea, and Perigenes, and separable therefrom 

 only by this lunate vitta. In my catalogue I have been unable to 

 quote a number of the locality records on account of the mixing of 

 the species. 



Genus Orthaea Dall. — Say's name Pamera, used by Stal for 

 this genus, published in 1832 as a straight substitute for the pre- 

 occupied Pachymerus Lep. & Serv., a palcearctic genus. The 

 same year Laporte published the name Arphanus as a substitute 

 for this same preoccupied name. I know no way to determine 

 for certain which of these works appeared fiist and personally 

 prefer to use the name Aphanus for two reasons: Laporte's paper 

 was a systematic work in which the author undertook to name a 

 type for each of the Heteropterous genera known to him and for 

 this genus he names rolandi Linn., which was one of the original 

 species and a perfectly valid type fixation. Say's work was a 



