Vol. XXVlii] ENTOMOLOGICAL NEWS. 263 



costal edge of stigma of front wing 2, of hind wing 1.8, maximum 

 width of front wing (mid-way between nodus and stigma) 5.5, same 

 of hind wing, 5.5, width of head 4.8 mm. 



Type a male from Peralta, Costa Rica, August 8, 1909, by 

 P. P. Calvert, in the writer's collection at the Academy of 

 Natural Sciences of Philadelphia. 



In August, 1909, a short distance back of Peralta Station 

 of the Costa Rica Railway, altitude 322 meters, 1055 feet, 

 there extended a Y-shaped track to enable locomotives to 

 reverse their heading. At the end of the stem of the Y was a 

 narrow, slow-moving stream called simply "laguna." Just 

 beyond the laguna was a low woods consisting of small trees, 

 arums, ferns, heliconias and numerous vines or creepers. Here 

 the type of Miocora peraltica was taken about noon. 



The generic name Thore Selys, 1853, from which his legion 

 Thore takes its appellation, was preoccupied by the name 

 Thore applied to a subgenus of Attid spiders by C. L. Koch 

 (Ubersicht des Arachnidensystems, 5tes Heft, p. 66, Niirn- 

 berg, 1850). I therefore propose the name Polythore for 

 the Odonate genus in allusion to the denser venation of its 

 members in comparison with other genera of the Selysian 

 legion. The type of Thore was fixed by Kirby (Cat. Odon. 

 1890, p. 116) as T. glgantca Selys, so this species becomes 

 the genotype of Polythore. The oldest generic name thus 

 left in the legion is Chalcoptcryx Selys, 1853. 



The Knaus Collection of Coleoptera. 



Mr. Warren Knaus (class of 1882, Kansas State Agricultural Col- 

 lege) has donated to the Entomological Museum of the College, his 

 valuable collection of Coleoptera. Ever since he was a student in the 

 College, Mr. Knaus has spent practically all of his spare time and vaca- 

 tions in collecting and studying the Coleoptera. He has made many 

 trips into the arid regions of Mexico, Arizona, Texas and New Mexico 

 to collect insects. These trips have been productive of a great many 

 new species. His collection contains a number of species that are only 

 found in one or two museums in the world, and these were furnished 

 by Mr. Knaus. His collection will be kept separate and will be known 

 as the "Warren Knaus Collection." GEORGE A. DEAN, Manhattan, Kan- 

 sas. 



