56 Journal New York Entomological Society, [vol. xvi 



is very rare. This had been bred from galls on black locust infested by a moth 

 (EcdytolopJia insiticiana Zell.). 



Meeting of April 2, 1907. 



Held at the American Museum of Natural History. President C. W. Leng in 

 the chair with sixteen members and six visitors present. 



The librarian reported the receipt of the following exchanges : 



Berliner Entomol. Zeitschrift, LI, Nos. 2 and 3. 



Zeitschrift f. wissenschaftliche Insektenbiologie, III, No. 1. 



Proc. Amer. Acad. Arts and Sciences, XLII, Nos. 20-25. 



Dr. Felt exhibited a large series of original photomicrographs illustrating the 

 wing venation and genitalia of Cecidomyiidse. He is engaged in preparing a mono- 

 graphic account of this group, and stated that these flies vary greatly in structure. 

 Some 750 European forms have been listed and it is probable that our fauna is some- 

 what richer, possibly totaling 1,000 or 1,200 species. The habits and general biology 

 of the group together with the methods of collecting were discussed in an informal 

 way. 



Professor Wheeler exhibited photographs and specimens of the agricultural ants 

 which occur in the arid regions of the southwest. These possess a curious arrange- 

 ment of long hairs underneath the head similar to those which have been found in the 

 ants of the Sahara. He had tbought that these were adaptations for carrying water, 

 but among the specimens of a species kept in captivity he could find no such use 

 made of the hairs. He suggests that these are more likely used for toilet purposes, 

 acting as a brush to assist the strigil of the leg. Professor Wheeler also exhibited 

 some excellent photographs of ants. 



Mr. Joutel spoke of the finding of a Ptinid beetle (Gibbium scotias) at the 

 Produce Exchange by Mr. Davis. This is an unusually rare species. 



Meeting of April 16, 1907. 



Held at the American Museum of Natural History. President C. W. Leng in 

 the chair with thirteen members and two visitors present. 



The librarian reported the receipt of the following exchanges : 



A Collection of Ants from British Hondurus by Wm. M. Wheeler. Bull. Am. 

 Mus. Nat. Hist., XXIII, pp. 271-277. 



Canadian Entomologist, XXXIX, No. 4. 



Verhandl. d. k. k. bot.-zool. Gesellschaft. Wien, LVII, No. I. 



Zeitschrift f. Wissenschaftliche Insektenbiologie, III, No. 2. 



The Insect World, XI, No. 3. 



Georgia State Board of Entomology, Bull. No. 23. 



Mr. Davis of the field committee reported that there would be a society excursion 

 to Newfoundland, N. J., on April 26. 



Professor Wheeler gave an interesting talk on the genus Formica and said in part 

 as follows : 



The genus Formica was the only one recognized by Linnaeus as including the 

 various species of ants ; but gradually it became divided, first by Latreille and Fabri- 

 cius, and later by others until now it includes only a small number of our species 

 All species belonging to it are found in the North Temperate Zone, none extending as 



