1893.] ■ 157 



The lobes and plates are much as in other Mytilaspis species. Between the 

 median lobes, which are well apart, are two spinous plates. The median lobes are 

 well-formed, rounded, and blunt. The second pair of lobes are more pointed, some- 

 times indistinctly trilobed ; those of the third pair are fairly well developed and 

 notched. Beyond the third lobe are two pointed projections, and anterior to these 

 the margin is more or less scalloped, with a couple of distinct incisions. There are 

 spinous plates, as usual, between the 1st and 2nd, and 2nd and 3rd lobes. 



The male scale occurred in some abundance. It is about 1 mm. long, straight, 

 with parallel sides ; larval skin at one end. Scale greyish- white ; larval skin orange. 

 The scale has no keel, of course ; it resembles the $ scale of a Parlatoria. 



On the same plants I found Chionaspis minor, Mask., Aspidiotus sp. (very near 

 to, perhaps identical with, A. punicce, n. sp.,* which I found on pomegranate), and 

 a Pseudoparlatoria, so similar to Ps. ostreata, that I believe it to be only separable 

 as a slight variety. When I first found Mytilaspis albiis, seeing the tricarinate male 

 scales of C. minor on the same plant, I thought I had got a new Chionaspis. 



This Mytilaspis, being white, cannot well be confounded with any other American 

 species. Maskell has described white species from New Zealand, which appear to be 

 distinct from M. albus. 



PlNIfASPIS PANDANI (Comst.). 

 According to Mr. Morgan, this should be referred to P. huxi, Sign. It occurs 

 in Jamaica on cocoa-nut and Dracaena ; and Mr. Hart sent it to me from the Royal 

 Botanic Gardens, Trinidad, where it was found in abundance on the leaves of Pan- 

 danus. In the Trinidad specimens it was accompanied by Ischnaspis filiformis, 

 Doug. 



PlNlSrASPIS BAMBUS^, fl. Sp. 

 I found this abundantly on a section of bamboo stem, which had been used for 

 a flower pot at the Hope Gardens, Jamaica. Of course the specimens were all dead. 

 9 scale about 1 mm. long, mytiliform, pale horn, with a median keel, and 

 inclined to be tricarinate. First skin very small, second skin large and extending 

 forward, as usual in the genus. Ventral scale more or less developed. The second 

 skin is covered by secretion. 



The adult female (after boiling in caustic soda) is elongate, pale yellowish. 

 The median lobes, as in P. pandani, are closely approximated, and notched 

 without. The second lobes are small, and the thii'd rudimentary, followed by a 

 notch in the margin. Between the first and second lobes is a small spinous plate, but 

 between the second and third a large plate. On the margin, beyond the notch, is a 

 spine, and then a large spinous plate. Then follows, at a fair distance, a smaller 

 notch, and then another spine and spinous plate. Further, on the side of the seg- 

 ment adjacent to the caudal portion, are two large spinous plates. Thus, the 

 arrangement is very much as in pandani, and, except for the rather different scale, 

 it would not be easy to separate the two. Chionaspis minor, Mask., which is easily 

 distinguished by its scale, has also a very similar arrangement of plates and lobes. 



* I could not be sure about these specimens, as nearly all had been destroyed by parasites. 

 A. punicce, which I shall describe at length in a future paper, occurs on the leaves of pomegranate 

 in Kingston, Jamaica, and has been found by Mr. C. A. Barber on cocoa-nut in Dominica. The 

 scale is white, covered with orange-brown exuvise, the first skin nipple-like. The terminal lobes 

 and plates show much resemblance to those of A. ancylus. Mr. Morgan's A. dictyospermi is allied, 

 but fully distinct. 



