5 COSTA RICAN DIPTERA 



b}^ a fringe of trees and rather low woods here and there. In the 

 wood were many buU's-horn-thorns {Acacia spp.). River shallow, 

 narrow (10-15-20 feet wide). 



La Verbena. — A coffee farm near San Jose. Altitude about 

 3738 feet. 



Paper 1. — A Partial Report on the Borboridae, Phoridae 

 and Agromyzidae 



By J. R. Malloch^ 

 Plate I 



This paper presents descriptions of several new species and 

 records of others previousl}^ described in the families Phoridae, 

 Borboridae, ahd Agrom3^zidae, which occur amongst the material 

 collected by Dr. P. P. Calvert in Costa Rica, in the latter half of 

 1909 and early in 1910. All the types are in the Academy of 

 Natural Sciences of Philadelphia. 



It is possible that some of the species described herein as new 

 may really be identical with European species, but unless in cases 

 where I have very sound reasons for associating the forms, I have 

 taken the course of giving to the Costa Rican insects names which 

 wall serve to distinguish them, in addition to the fullest possible 

 description, which is in my opinion the safer plan than to link 

 up two forms which, while very close in general appearance, maj' 

 ultimately prove to belong to entireh" different species. 



One thing that strikes me in looking over the Borboridae is 

 the absence of such species as ferruginata Stenh., and crassimana 

 Hal. The former is cosmopolitan in its distribution and the latter 

 is, while not recorded from so many different continents, very 

 probably one of the species which occur almost everywhere in 



1 On account of the limited time Mr. Malloch was enabled to give to the 

 study of the species of these families, the final preparation of this paper 

 for publication, especially the preparation of the figures, was left to me. 

 The descriptions and their accompanying notes are as Mr. Malloch prepared 

 them. The figures were made with the aid of the camera lucida and are ac- 

 curate except towards the base of the wings, where it was difficult to get the 

 proper illumination, and no attempt has been made to correct such inaccur- 

 acies. In one or two cases the wings were more or less folded and the vena- 

 tion had to be worked out towards the hind margin. The only noteworthy 

 case for correction is in figure 7 in which the third vein should be shown 

 same as in figure 11. — E. .T. Cuessox, .Ir. 



