214 THE ENTOMOLOGIST. 



2. Second submarginal cell comparatively narrow, its depth 



320 microns, from apex 256 //, . Taracticus contusus, Ckll. 

 Second submarginal cell broader toward apex, its depth 



320 microns, from apex 480 jj. ; wing 6 mm. long . 3. 



3. Apical sides of discal cell equal (160 /x), as in the living 



Taracticus octopunctatus and Cophura fur, the apical 

 angle of the cell little greater than a right angle ; 

 venation pale .... Cophura antiquella, Ckll. 



Apical sides of discal cell unequal, that on third posterior 

 twice as long as that on second, as in the living 

 Nicocles rufus and Cophura clausa, the apical angle 

 of the cell very much greater than a right angle; 

 venation dark .... Taracticus renovatus, Ckll. 



These can be readily distinguished from typical Leptogaster 

 by the base of the second posterior cell, which is strongly pro- 

 duced in Leptogaster. I have not found Leptogaster in the 

 Florissant shales, but Professor Melander has kindly sent me a 

 photograph of a very good specimen he found among the Floris- 

 sant materials now in his hands. This fossil has the second 

 posterior cell produced in the manner of the European L. cylin- 

 drica and L. guttiventris, and the European fossil, L. hellii, 

 linger ; but the latter, if Heer's figure is correct, is very peculiar 

 in having the anterior cross-vein meeting the basal end of the 

 second posterior cell, and the anal cell broad in the middle and 

 greatly narrowed apically. In the American L. badius the anal 

 cell is narrowed apically as in L. hellii, but the second posterior 

 cell is no more produced basally than in Cophura. L. cylihdrica 

 (tipidoides, Fabr.) is the type of Leptogaster ; L. badius, Loew, 

 may stand as the type of a new subgenus (or genus ?). 



Tipulogaster. — This also has the second submarginal cell 

 shorter than in typical Leptogaster, while the distance between 

 its base and the anterior cross-vein is much greater. 



FIVE MONTHS' BUTTERFLY COLLECTING IN COSTA 

 RICA IN THE SUMMER OF 1911. 



By Margaret E. Fountaine, F.E.S. 



(Concluded from p. 195.) 



Dircenna euchytina, Feld. — Five specimens, including two females 

 from Guapiles ; and one only from San Jose. Much rarer than 



Colloleria tutia, Hew. — One female from Limon in August. 



Ithomia heraldica, Bates. — Two males in June, and one female in 

 July ; all from San Jose. 



i". patilla, Hew. — Not common at San Jose. I bred it from a 

 larva found at San Antonio ; it was greenish, and most insignificent 



