333 



"The Seci'etary iiicntioned that petroleiiin oil, especially in the crude state, had in 

 France been found of frreat use in destroying insects; the petroleum was mixed with 

 water, in the proportion of an ounce to half an ounce to a pint of water, but when 

 ajjplied to fruit trees or delicate plants the quantity of oil was still less; a very weak 

 solution with a watering pot was said to be very efficacious against the larva) of 

 Cockchafer, and a strong solution poured into the holes and down walks infested by 

 insects were said to kill them rapidly. Another application of the solution was said 

 to rid dogs and other animals of parasites; but the i»arts nuist be rubbed with soap 

 a few minutes after the solution was applied." * » * — [^jj. F. Wickham, Iowa, 

 March 8, 1892. 



Reply. — * * * j^^^ mixture mentioned in the passage which you quote is by 

 no means an emulsion, but I am always glad to meet with early references to the use 

 of kerosene.— [March 17, 1892.] 



List of Coccidae observed in Jamaica.* 



(1) Aspidiotus ficus (Kiley MS., Ashm.) Comst. Kingston. 



(2) Aspidiotus minutus Ckll. MS. On Cocoanut Palm, near Montego Bay. Collected 



by Dr. Sinclair. Not yet studied sufficiently ; seems not to be mature. Occurs 

 with A. rapax var., but the young of that species, when of the size of minutus, 

 are black with a slight, pale rim. 



(3) Aspidiotus 2)erso7iai us Comst. Kingston. (Also Barbadoes. ) 



(4) Aspidiotus r«j>rtx var. j^ai/nce v. nov. Ckll. MS. On Cocoanut Palm, near Montego 



Bay (Dr. Sinclair). 



(5) Aspidiotus rufescens Ckll. MS. A. rufcscens Ckll. Jamaica Post, December 14, 



1891, p. 5. Very near to A. articulatuH Morgan (1889). On many trees. Kings- 

 ton. Abundant. (Also Barbadoes.) 



(6) Aspidiotus uvaiCoaist J. A species on Grape, doubtfully referred to this ; not yet 



studied. 



(7) Ceroplastes cirripcdiformis Comst. Kingston. 



(8) Ceroplastes floridensis Comst. Kingston. 



(9) Ceroplastes jamaicensis Ad. white. Basin Spring. (Gosse.) Not seen by me. 



(10) Chionaspis vandalicus C^ll. MS. =? Diaspis vandalicus. Galver. Abundant on 



Cocoanut, near Montego Bay. (Dr. Sinclair.) Probably the same as the D. 

 vandalicus of Cuba, of which, however, I know no proper description. 



(11) Chionaspis sp. Kingston. $ scale white. Not studied. 



(12) Chionaspis sji. Kingston. 9 scale dark. Not studied. 



(13) Dactijlopius sp. on Acalypha. Kingston. Not yet enough studied. 



(14) Diaspis sp. on Capsicum. Kingston. Not yet enough studied. 



(15) Diaspis pelargonii Cy.W.'iii^. On Pelargonium. Cinchona plantation. (Coll. W. 



Harris.) Near to D. rosw, but seems to difler somewhat. 



(16) Fiorinia camelliw Comst. On Cocoanut, near Montego Bay. (Coll. by Dr. Sin- 



clair.) On the same leaves I find a curious yellow creature, with a fringe all 

 round, and some pink filaments at each end, so it is possibly the young form of 

 Fiorinia? 



(17) Lecanium (?) dendrophthorce Ckll. MS. On Dendrophthora. Cinchona planta- 



tion. (Coll. W. Fawcett.) This I have already discussed in previous letters. 

 I keep it provisionally as a Lecanium, but quite expect it is (as I supposed) a 

 Pulvinaria or Lichtensia. 

 {18) Lecanium sj). Very near the last. On Plumieria rubra. Kingston. Neobernardia 

 n. nom. (gen. or subg.) Ckll. MS. = Bernardia Ashm. (Nom. P. Br. in Euphor- 

 biaceae.) t 



* I have examined all of the above except Ceroplastes jamaicensis. — T. D. A. C. 



t It is not considered as a rule that preoccupation in botany prevents the use of a 

 name in zoology, though I am myself of opinion that it ought to. But in the present 

 case we might get a Bernardia (Ashm.) living on a Bernardia {P. Br.), which would 

 be rather confusing. T. D. A. C. 



