6 



(c ue) all on the same lignum -vitas tree in Miss Long's garden in King- 

 ston. 



Destructiveness. — Not a serious pest as so far observed, but is a more 

 dangerous species than the last, should it become very numerous. 



(28.) Ceroplastes plumbaginis, Ckll. (The Plumbago Wax-Scale). 



Diagnosis. — Extemely like the last, but somewhat higher, the breadth 

 and height being the same (3 mm.), the length slightly greater (4 mm.). 

 Eggs pink ; larva yellowish, oval. It is possible that this species is 

 not distint from the last, except as a variety. 



Distribution. — Only known from Antigua, where it was discovered by 

 Mr. Barber. 



Food-plants. — Found on Plumbago. 



Destructivensss. — To judge from the twigs sent by Mr. Barber, I 

 should say it must be rather troublesome. 



Enemies. — A small beetle, Scymnus ochroderus var. cyanipennis, was 

 sent with the original specimens. It is without doubt predatory on 

 the scale, or its eggs after the manner of its kind. 



(29.) Ceroplastes j amaicensis, White. (The Lance-Wood Wax-Scale). 



This was found by Gosse on the trunk of a lance-wood tree at Basin 

 Spring, Jamaica. It is said to be yellowish-green, with distinct plates 

 after the manner of cirripediformis. As in the case of 0. my r tea?, the 

 description will not enable it to be certainly identified, unless specimens 

 are brought from the same place, taken from the same kind of tree. 

 Should it prove to be the same as cirripediformis, White's name will 

 have to be used, as it was published in 1846. 



(30.) Ceroplastes depressus, Ckll. (The broad Wax-Scale.) 



Diagnosis. — Much like cirripediformis, but flatter, longer and circular 

 or rearly so in outline. 



Distribution. — Known only from Kingston, Jamaica, where it was 

 found by Mrs. Swainson. 



Food-plants. — It lives, in company with Icerya ro*ce, under the bark 

 of lignuni-vitae. Its flattened shape is adapted to its environment. 



Destructiveness. — Not known to do any perceptible harm. 



Enemies — It is attacked by a parasite, Eucomys aibicoxa, Ashm, 

 notwithstanding its sheltered position. 



(31.) Ceroplastes denudatus., Ckll. (The denuded Wax-Scale.) 



Diagnosis. — In its earlier stages, it is covered with wax, which is 

 divided into plates ; but it finally loses the waxy covering, the result 

 being that old scales look extremely like Lecanium hemisphcericum. 

 A naturalist unacquainted with the earlier stages, would be almost 

 sure to regard the insect as a Lecanium. 



Distribution — Discovered by Mr. Barber in Antigua. Since report- 

 ed from Demerara. 



Food-plants. — On Sour Sop in Antigua. Mr. Maskell wrote me 

 that he thought the Demerara specimens he had received through Mr. 

 Douglas were on Croton. 



Destructiveness. — From its gregarious habit, clustering on the twigs 

 like the Lecanium it imitates, it must surely be a very troublseome 

 species.. 



Enemies. — In Antigua it suffers greatly from the attacks of a predaceous 

 lepidopterous larva. 



