92 JouRNAT, New York Entomological Society. [Voi. xvii. 



previous observations. Many of the larvae died during development, but 47 of the 

 original brood survived to form cocoons. He was fortunate in having one male and 

 two females emerge on August 18 and on August 20, three more females. The hy- 

 brid moths were Cynthias in every respect and if mixed with pure breed individuals 

 could not be separated. The male mated naturally with one of the females, which 

 oviposited normally, and these hybrids eggs of the second generation hatched on 

 September 3. Of the 196 eggs laid practically all were fertile. Upon hatching it 

 was noticed that these larvae were smaller than the type, and showed more variation 

 in color during their development. Cocoons were obtained of 39 larvae between 

 October 8 and 21. In conclusion Mr. Pollard remarked that if there was any tend- 

 ency in the hybrid to follow Mendelian principles of inheritance, the moths of this 

 generation emerging next spring should display some interesting results. Both typi- 

 cal and hybrid forms were exhibited. 



Mr. Beutenmiiller exhibited types of the following fossil Diptera from Florissant, 

 Colorado, described by Professor T. D. A. Cockerell : Tabatms parahippi, Tabanus 

 hipparionis, Chilosia vtiocenica, Psilocephala hypogcea and Lithocosmos coquilletti. 

 Mr. Beutenmiiller also exhibited some Orthoptera collected by Mr. Webber in Sumatra, 

 and presented to the American Museum. Among these were sixteen new species and 

 a number of very curious mimetic forms. 



Society adjourned. 



Meeting of January 19, 1909. 



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

 chair and fourteen members present. 



The librarian reported the receipt of the following exchanges : 



Bulletin Societa Entomol. Italiana, XXXIX, Nos. 1-4. 



Canadian Entomol., XLI, No. 1. 



Insect World, XII, Nos. 11 and 12. 



Revista do Musea Paulista, Vol. VII. 



Zeitsch. f. Wiss. Insekten-biologie, IV, No. 12. 



Tijdschrift Entomol., 1908, Nos. 3 and 4. 



Berliner Entomol. Zeitschr. , LIII, No. 2. 



Bull. 216 N. J. Agric. Exp. Sta. 



Proc. Cal. Acad. Sci., 4th Sen, III, pp. 41-48. 



Mr. Dickerson made a few remarks on the house mosquito, Culex pipiens, and 

 commented on the bulletin concerning the insect by Professor J. B. Smith recently 

 issued by the N. J. Experiment Station. He said that while the salt meadows in 

 this section of New Jersey had been drained, and as a result, the salt marsh mosquitoes, 

 Culex sollicitans and c<r«/rt^r, 'practically suppressed, the unusual weather conditions 

 last spring had permitted the house mosquito to become unusually abundant and 

 troublesome. Where the authorities had oiled the sewer basins and taken other pre- 

 cautions, there had been little trouble, and it had been shown that although this insect 

 had to be considered in our campaign, it could be readily controlled if this sort of 

 work was carried on by the Board of Health. 



Mr. Dickerson also exhibited a series of specimens of Satyrus alope, "ar. mari- 

 tima, varying from the typical form to that closely resembling the form ttephelc which 

 was collected at one time at Chester, N. J. Messrs. Sleight and Engelhardt stated 



