54 ENTOMOLOGICAL news. [Feb., 'o6 



On Some Aquatic Hemiptera From Costa Rica, 

 Central America. 

 By J. R. de la Torre Bueno. 

 It has been my good fortune to become acquainted in the 

 past year, through correspondence, with Professor Paul Biolley, 

 of San Jose de Costa Rica, who has sent me from time to time 

 whatever he has collected for me in aquatic Hemiptera, prin- 

 cipally in the Cryptocerata. In this period I have received 

 from him a number of the bugs noted by Champion as from 

 that country and some others not heretofore recorded from 

 that region. They are as follows : 



i. Acanthia sulcicollis Champion. 



One specimen from La Palma, taken in April at an altitude 

 of i, 600 meters. This species is not recorded from Costa 

 Rica in Biologia Centrali-Americana, although it occurs in 

 Guatemala and Panama. 



2. Gelastocoris bnfo Herrich-Schaeffer. 



Found abundant on the shores of the Rio Surubres, near San 

 Mateo, at an altitude of 250 meters, on the Pacific side of Costa 

 Rica, in company with the two following species : 



3. Gelastocoris vicinus Champion. 

 Rio Surubres near San Mateo. 



4. Gelastocoris sp. near vicinus Champion. 

 Rio Surubres near San Mateo. 



In the present uncertain condition of the specific differences 

 in the Gelastocoridse it is difficult to pronounce on any distri- 

 bution, which may or may not be real. 



5. Mononyx fuscipes Guerin. 



One specimen only, taken in the Reventazon Plain, near 

 Santa Clara, on the Atlantic slope. This individual was found 

 in a rotten log in December, 1904. It is an extremely wide- 

 spread form throughout North and Central America. 



6. Mononyx nepaeformis Fabricius. 



One specimen taken at the same time as the Gelastocoris under 

 a stone at the edge of the Rio Surubres, in February. This 

 species extends from Mexico south to the Argentine Republic. 



