333 
“The Secretary mentioned that petroleum oil, especially in the ernde state, had in 
France been found of great 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 
applied 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 larye 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 parts must be rubbed with soap 
a few minutes after the solution was applied.” * * * —[H. F. Wickham, Iowa, 
March 3, 1892. 
REPLY.— * * * The 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 Coccidz observed in Jamaica.* 
(1) Aspidiotus ficus (Riley MS., Ashm.) Comst. Kingston. 
(2) Aspidiotus minutus Ckll. MS. On Cocoanut Palm, near Montego Bay. Collected 
by Dr. Sinclair. Not yet studied sufficiently; seems nottobemature. 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 personatus Comst. Kingston. (Also Barbadoes. ) 
(4) Aspidiotus rapax var. palme v. nov. Ckll. MS. OnCocoanut Palm, near Montego 
Bay (Dr. Sinclair). 
{5) Aspidiotus rufescens Ckll. MS. A. rufescens CkU. Jamaica Post, December 14, 
1891, p.5. Very near to A. articulatus Morgan (1889). Onmanytrees. Kings- 
ton. Abundant. (Also Barbadoes.) 
(6) Aspidiotus we Comst.? A species on Grape, doubtfully referred to this; not yet 
studied. 
(7) Ceroplastes cirripediformis Comst. Kingston. 
(8) Ceroplastes floridensis Comst. Kingston. 
(9) Ceroplastes jamaicensis Ad. white. Basin Spring. (Gosse.) Not seen by me. 
(10) Chionaspis vandalicus Ckll. 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 sp. Kingston. @ scale dark. Not studied. 
(13) Dactylopius sp. on Acalypha. Kingston. Not yet enough studied. 
(14) Diaspis sp. on Capsicum. Kingston. Not yet enough studied. 
(15) Diaspis pelargoniti Ck. MS. On Pelargonium. Cinchonaplantation. (Coll. W. 
Harris.) Near to D. rose, but seems to differ somewhat. 
(16) Fiorinia camellie 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 (?) dendrophthore 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) Lecaniumsp. Very nearthe last. On Plumieria rubra. Kingston. Neobernardia 
n. nom. (gen. or subg.) Ckll. MS.= Bernardia Ashm. (Nom. P, Br. in Euphor- 
biacez.) t 
*T 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 zoélogy, 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. 
