Occasional Papers of the Museuui of Zoology 1 1 



identified, labelled and arranged for distribution to students 

 bv Mr. J. H. Williamson. He also prepared in tabular form 

 a complete list of localities, with the species taken at each 

 locality. This tabulation was invaluable in the preparation of 

 this paper. Dr. Calvert and Dr. Ris have checked Mr. Wil- 

 liamson's determination of species from a set of specimens 

 sent to each, and the determination of three species, laesa, ■ 

 moribunda, and mortiiu, rests upon Dr. Ris's authority. 



In this paper, when reference is made to the Hetaerinas 

 of Venezuela or of Colombia, for example, only the species 

 taken on the trips mentioned in the first paragraph are implied. 

 It is not the purpose of this paper to discuss other hitherto 

 published records either of species or localities. Neither does 

 this paper deal with specific characters or relationships. Too 

 many species of Hetaerina are wanting in my collection to 

 render such an attempt practical. Of the species discussed 

 in this paper I have retained large series of specimens for my 

 collection, and these are available at any time for any student 

 who will undertake a systematic revision of the genus. 



The localities represented by the specimens before me may 

 be conveniently summarized as follows : In Guatemala, a 

 section across the country on the line of the transcontinental 

 railroad; two stations\on the railroad in Panama; the Santa 

 Marta region and the valley of the Magdalena to just above 

 Honda in Colombia; the north coast of Venezuela west of 

 La Guiara, a few nearby tributaries of the Orinoco, and sta- 

 tions in the Rio Catatumbo drainage south of Lake Mara- 

 caibo ; streams in northern Trinidad ; two stations in the 

 department of Junin, Peru; and stations in the Demerara and 

 Essequibo river basins, all within one hundred and fifty miles 

 of the coast, in British Guiana. All localities are alphabetic- 

 ally arranged and briefly described in the last part of this paper. 



