334 



(19) Lecanium {Neobernardia) olecB Bernard. Kingston. 



(20) Lecanium, (Neobernardia) hemisphoericiim Targ. Kingston. Cockerell and Bath 



(Mrs. Swainson.) 



(21) Myiilafipis citricola (Pack.) on oranges, etc. 



(22) Orthesia prwlomja Douglas. Kingston. 



(23) Parlatoria sjj. On Amhjplia. Kingston. Not studied. 



(24) Parlatoria pergandei var. crotonis Ckll. MS. v. nov. Extremely close to pergan- 



dei, but seems to diifer slightly in the arrangement of the plates. On Varie- 

 gated Croton. Kingston. 



(25) PlanchoniaJimbriataWestw. OuAkee. Kingston. Last segment of 9 reminds 



one of Diaspis. 



(26) Pscudococcus ruber Ckll. MS. n. sp. Nearest P. nlicis Doiigl. I have no Pseudo- 



coccus to compare this with, but I suppose it to belong to that genus. The 

 legs are dark brown. On Euphorbia. Kingston. 



(27) Pulvinaria sp. On Akee. Kingston. Not studied. 



(28) Vinsonia stellifera (Westw.) Dougl. On Mango. Cumberland Pen. There are 



also about half a dozen other species, not yet examined, belonging to various 

 genera. — [T. D. A. Cockerell, Jamaica, Dec. 23, 1891. 



The Broken-tail Snail in Bermuda. 



* * * I now send you specimens of the "Broken-tail Snail" which is literally 

 eating up the island and is very destructive to the gardens and the fields of potatoes. 

 We destroy them with salt, lime, and such things, but the surest way is to catch 

 and destroy. My gardener spends nearly two hours each morning catching them, in 

 a garden of about 10 rods, getting half a bucketful each day. Where they can all 

 come from is a question to me, as I have all around my garden a border 10 feet wide 

 which is kept perfectly clean and very few snails we can find crawling on this spot. 



Is there any known disease to which these snails are subject and is there any way 

 of causing an epidemical scourge among them? At the rate they are increasing they 

 will soon have complete possession. Some people have already abandoned their gar- 

 dens and given up this struggle for vegetables. * * * — [Gen. Russell Hastings, 

 Hamilton, Bermuda Island, March 9, 1892. 



Reply. — * * * The animal which you call the "Broken-tail Snail "has never 

 been known as a pest within the limits of the United States, although it occurs in 

 small numbers near Charleston, S. C. It is a European species, and has been intro- 

 duced into your island. I can make no suggestions regarding remedies which have 

 not already been published in Bermuda. * * * i assume that you must have 

 seen the little pamphlet recently published by the Board of Agriculture, in response 

 to an advertisement offering prizes for descriptions of the history of the Spiral 

 Snails, and the most efficacious, expeditious, and economical methods to effect 

 their extermination. The species has been named for me from your specimen by 

 Mr. Wm. H. Dall, our best authority on Mollusks, as Emnina decoUata L. With regard 

 to the practical use of some disease or some parasite, I may state that I know of no 

 disease, and while certain snails are secondary hosts of some Eutozoa, unfortunately 

 these creatures find their primary hosts in domestic animals, so that they can not be 

 utilized.— [March 17, 1892.] 



Bumble-bees and the Production of Clover Seed. 



Do Bumble-bees have anything to do with the jiroduction of clover seed? * * » 

 [Mrs. C. H. Pike, Michigan, March 4, 1892. 



Reply. — * * * Numerous experiments have placed the matter beyond doubt, 

 and it is safe to say, with all positiveuess, that Bumble-bees are very important 

 agents in bringing about the fertilization of clover blossoms, which, as is well known, 

 must take place before seed will form, and also to say that these 'bees are especially 

 serviceable in bringing about cross-fertilization. 



