4 Annals Entomological Society of America [Vol. VI, 



Four of these localities are here described briefly. 



Juan Vinas, on the Atlantic slope, was particularly fruitful 

 as a collecting ground owing to its combination of many of the 

 advantages mentioned above. The railroad station, 73 miles 

 from Limon, and at an altitude of 3300 feet, is on the bottom 

 of an old crater the rim of which, at the general level of the 

 country, is 700 feet higher; the village of Juan Viiias is at this 

 latter elevation. From the railway, in half an hour, one may 

 reach the Rio Reventazon, 800 feet below. The canyon of this 

 river thus has a depth of 1500 feet, and presents a great variety 

 of slow- and of swift-flowing brooks, cascades, waterfalls, forest, 

 swamp, bare rock and dense vegetation. It was productive of 

 material illustrating previously unknown life-histories of inter- 

 esting Odonata (Cora, Mecistogaster, Thaumatoneura, Philo- 

 genia, Palaemnema, etc.). 



Surubres, on the Pacific side, at an altitude of about 800 feet, 

 was a favorite with the late Professor Paul BioUey, where he 

 gathered much insect material subsequently sent to entomolo- 

 gists in the United States and in Europe. A week was spent in 

 the hacienda, which he occupied on several occasions, but at a 

 different time of year, to secure data to supplement those which 

 he obtained. 



The northwestern province of Costa Rica, Guanacaste, has 

 been little visited by entomologists. Thanks to Professor J. F. 

 Tristan, the writer accompanied an official educational commis- 

 sion thither, and collections and observations were made at 

 Filadelfia, Liberia, Santa Cruz, and Hacienda Guachipelin. 

 The last named, at an altitude of 1700 feet, is not far from 

 the still unexplored Volcano Rincon de la Vieja. 



Cartago, near the top of the Atlantic slope of the railroad, 

 was, until its destruction, alluded to above, a convenient center 

 for visits to various parts of the country and served as the 

 breeding place of living material collected on these excursions. 



(Other aspects of this visit to Costa Rica have been described 

 in Entomological News, vol. XXI, pp. 334-337, July, 1910, and 

 in Old Penn Weekly Review of the University of Pennsylvania, 

 vol. IX, pp. 165-170, Nov. 12, 1910. Some of the results 

 obtained from studies on Costa Rican Odonata have been pub- 

 lished in Entomological News for 1910, 1911 and 1912, and will 

 probably be continued in subsequent volumes of the same 

 journal.) 



