151 



The insect itself is very pale yellowish, with a slight pink tinge. 

 Distribution. — Discovered March 1893 in Mr. Streadwick's Marine 



Garden, Kingston, Jamaica. Not yet found elsewhere. 

 Food-plan'. — It occurs on the culms and sheathing bases of leaves of 



Sugar-Cane. 



Dtstructi'-eness. — No good opportunity has occurred to form an esti- 

 mate of this. 



Parasite — It has an undetermined parasite. 



(73.) Aspidiotus hartii, Ckll. (The Yam Aspidiotus.) 



Diagnosis. — Scale much like sacchari, with the same curious pinkish- 

 brown tint. The first skin is shining pale straw colour. When 

 the scales drop off the yams, they leave conspicuous white marks ; 

 sj that, to use a hiberuicisna, their presence is most noticeable 

 when they are not there 



Distribution. — Only found in Trinidad. 



Food-plant. — On roots of yam, abundant. 



Destructiveness. — Mr. Hart says it does not appaar to injure growing 

 plants ; I should suppose it might interfere with the sale of the 

 yams. 



Variety. — The variety luntii, Ckll., was found by Mr. Lunt in Trini- 

 dad on the stems of some plant. The female, under the micro- 

 scope, does not show the groups of ventral glands of the type, 

 from which we infer that it is viviparous (ovoviviparous), the 

 type being oviparous. 



(74.) Aspidiotus biformis, Ckll. (The orchid Aspidiotus.) 



Diagnosis. — A round dark brown or reddish brown female scale, with 

 a small elongate-oval male scale. Sometimes the scales are 

 almost black; they have a granular surf <ce. 



Distribution. — Rather common on cultivated orchids in Jamaica and 

 Trinidad. Lately Mr. Alex. Craw has found it on an orchid 

 from Central America, — the precise locality unknown. 



Food-plants. — Orchids; Oncidium Sprucsi, Od mtoglossum grande, 

 Epidendrum, Cattleya Bowringiana. 



Destructiveness. — Certainly injurious to choice orchids. 



Varieties. — While this is a ver} r distinct species, it includes two va- 

 rieties, which I have named Cattleijo? and odontoglossi. The 

 former is noticeable for its black exuviae ; the latter has the 

 exuviae also black, but covered by pale secretion. 



Note. — An account of thi* species, with figures, will be found in The 

 Gardeners' Chronicle for May 6, 1893, p. 548. 

 (75.) Aspidiotus palmw, Morgan and Ckll (Tue Coconut Aspidiotus.) 



Diagnosis. — A small rather convex pale brown scale, with the exuviae 

 black, and on one side of the centre. The female has grouped 

 ventral glands, which are wanting in A. rapax, which has a 

 similar looking scale. 



Distribution. — Found in Jamaica and Trinidad. 



Food-plants. — Leaves of coconut palm and banana. I once found a 

 few scales on lignum-vita3 trees in Kingston. Jamaica, but they 

 were c'ose to some coconuts. 



Destructiveness. — It seems to do no serious harm. 



Parasites.- It has an undetermined parasite in Jamaica. 



Mesilla, New Mexico, Q.S.A., March 1, 1897. 



