352 I August, 



8. Aspidiotus articulatus, n. sp. (pi. v, figs. 3 and 5). 



$ scale greyish-white, depressed, more or less circular. Exuviae in the centre. 

 ? insect pyriform, with a marked division between the thoracic and abdominal 

 regions. The median pair of lobes on the caudal segment is notched on the outer 

 lateral margin, the 2nd pair is similar in shape, but larger than the median pair. 

 There is no third pair as usual, but on the dorsal side anterior to the third plate is 

 a pointed process, similar to that mentioned by Prof. Comstock as existing in Diaspis 

 Boisduvalii. There is one branched plate between the median lobes, two similar 

 plates between the first and second lobes, and three between the second lobe and the 

 pointed process above mentioned. Of these three plates the third is the largest and 

 sabre-shaped. Anterior to the pointed projection is a long, compressed, serrated 

 plate, followed by two or three shorter and simple plates. The spines are very 

 small ; one is situated at the base of each lobe, one at the base of the pointed pro- 

 cess, and one on the lateral margin beyond. There appear to be only two groups 

 of ventral glands, each group consisting of three or four glands. 



The species may at once be recognised by the separation of the thorax from the 

 abdomen. 



Found on Dictyospermum album received by Mr. Mclntire from Demerara. 



9. Aspidiotus longispina, n. sp. (pi. v, fig. 1). 



$ scale dark colour, with exuviae in the centre, and a small concentric circle in 

 the centre of the first larval skin. The exuviae and the concentric circle are difficult 

 to observe, as the whole scale and exuvia? appear of a very dark colour. The scale 

 is inconspicuous, and measures only about '6 mm., convex. 



$ insect pyriform. The caudal margin has only one pair of lobes, which are 

 long, with the outer lateral margin doubly notched. The anus is situated between 

 the bases of these lobes. There are about eight simple plates along the margin, 

 which are remarkable for their length. Four spines, which are even longer than the 

 plates. The first spine is adjacent to the base of the lobe, and the distance between 

 the second and third and third and fourth is about equal, and twice the distance of 

 that which separates the first from the second spine. The length of the spines and 

 plates is characteristic of this species. 



Found on Cupania sapida from Demerara, which was sent to Mr. Douglas by 

 Mr. Mclntire. 



10. Aspidiotus dicttospeemi, n. sp. (pi. v, fig. 2). 



? scale greyish-white, with exuviae in the centre, depressed, of an elongate oval 

 shape, about V2 mm. longest diameter. The centre of the larval skin is of a dark 

 orange colour, whilst the exuviae are of a light yellow. 



$ insect has three pairs of lobes. The median pair is the largest, notched on 

 the outer lateral margin, the second lobe is similar to the first in shape, but smaller, 

 and the third lobe is still smaller, with the outer lateral margin serrated. Two 

 simple plates between the median lobes, two between the first and second lobes, and 

 three between the second and third. The third lobe is followed by two long plates, 

 serrated on the outer lateral margin. Anterior to the last plate the margin is serrate 

 up to the commencement of the next visible segment. The lateral margins of the 

 first and second lobes are thickened at the base. Four small spines situated as 



