324 COSTA RICAN EPIGOMPHUS (oDONATa) 



difficult to exactly define the authorship of certain taxonomic 

 groups according to the strict letter of codes of nomenclature. 

 Epigomphus was established for a single species, paludosiis Hagen, 

 from Brazil. To it de Selys added, in 1869, ohiusus from Sao 

 Paulo on the upper Amazon and Peba, and, in 1878, subohtusus 

 from the volcano Irazu, Costa Rica, and San Agostino, Guate- 

 mala. 



In 19031 ti^p present writer discussed this genus, adding the new 

 species llavm from Chulumani in Bolivia, quadracies from San 

 Tsidro in Guatemala and Chiriqui, Panama, and tumefaciiis from 

 Cachi, Costa Rica, giving a synopsis of the six known species 

 and references to the previous literature. As much of this syn- 

 opsis and references as concerned the Central American species 

 was reproduced in the Biologia Centrali- Americana- in 1905, 

 including a previously unknown species, camelus, from Carrillo, 

 Costa Rica. Still another species, veriiiicornis, from Tuis, Costa 

 Rica, received as the Biologia volume was being completed, found 

 a place on the last page of the text.^ 



In an extensive and important work, Lihellen (Odonata) aus 

 der Region der anierikanischen KordiUeren von Costarica bis Cata- 

 marca^ Dr. F. Ris has dealt with Epigomphus, giving a table of 

 the males of six species in which the new species armatus from 

 Finca Hundriesser, Costa Rica, and hylaeus from Matto Grosso, 

 Brazil, are included.^ 



The writer's personal collecting in Costa Rica in 1909-10^ 

 and specimens subsequently gathered in that country by Messrs. 

 C. H. Lankester and D. E. Harrower and sent to him bring the 

 total of Costa Rican species of Epigomphus to seven. 



'Entomological News, xiv, pp. 184, 186-191. 



^Volume Neuroptera, pp. 169-172. 



^T. c, p. 410, 1908. 



''Archiv fiir Naturgeschichte, 82 Jahrgang 1916, Abteilung A, 9 Heft. 

 Ausgegeben im Juli 1918. Berlin, pp. 1-197. 117 figures in the text and 

 on two double plates. ^' 



^T. c, pp. 145-154. 



^See A Year of Costa Rican Natural History by Amelia S. and Philip P. 

 Calvert. New York. The Macmillan Co., 1917. 



