1S92.] Proceedings of Scientific Societies. '.' 



favored by this beetle ami early in August the lower leaves will I 

 found browned and entirely eaten, and in the pocket formed bj tl 

 separation of their two surfaces after the larva- have eaten away tli 

 interior are the freshly hatched beetles. From that dat 

 brood lives on the plants and eats the leaves into >ieve-like form.-, an 

 now in October, the tops also appear to be attacked. They :m du-,-1 

 imbricated and the beetles are nestling in the narrow en vices. 



Several other species of the tribe live on Btaten Island, but 1 ai 

 yet ignorant of their food plants. 



Mr. Arthur Hollick called attention to the gratifying manner i 

 which the law relating to the protection of song birds was hem 

 enforced in the country. During the past two weeks at least thr. 

 gunners had been arrested and heavily lined. On < '< ' 

 Gustav Merle, of New York, was arrested ami lined 8140 by du-th 

 Augustus Acker. He was caught with twenty-three dead birds m h 

 possession, which Mr. Hollick assisted in identifying 

 high-holders (Colaptes auratus),2 yellow-bellied wood-peckers V'. 

 rapicus varius), 9 hermit thrushes (Tardus jxdhisii >, :> cat birds Mim < 

 carolinensis), and 1 titmouse (Parus atricapiilus). 



December 12th, 1891.— Informal meeting. 



Mr. L. P. Gratacap, showed a thin section of the coarse trap toe 

 from Lambert's Lane, mentioned in the proceedings of dime 1M. 1>«J 

 and read the following further memorandum in connection with it : 



This coarse trap, previously alluded to as possibly containing hype 

 sthene has been since examined microscopically and found to be atri 

 diorite, made up of hornblende, plagioclase, feldspar and quarts, wit 

 traces of serpentization, due to alteration. It does not contain hype 

 sthene. In hand specimens it is markedly different from the usii; 

 fine grained, compact trap from the Graniteville quarries and won! 

 not form as good a stone for road making and other economic uses ; 

 does the latter. 



Mr. Gratacap also presented the following view- m regard to tl 

 trap dike and its possible influence on the water supply of the ,vgi..i 



The trap dike on our island, which expands into a widened an 

 at the Elm Park quarrv, passes from that point south-we.-u-riv m 

 narrowed ridire, scarcely ohservabh beneath tin mantle of drift whi< 

 covers it until at Graniteville it again is distended into a dome-lil 

 nucleus, which extends to the east-ward to the Church road 

 Krumm'a tavern, where the trap rock is only some seven feet or le 

 below the surface. From this point it sinks and is found again on tj 



