188 [August, 



DiASPis opuntijE, n. sp. 



Scale of the $ circular, or nearly so, pale yellowish-brown ; exuviae very dark 

 red-brown, distinct, central, or more rarely a little to one side. Diam., 2 — 2i mm. 



5^ adult almost circular ; groups of spinnerets well separated, and arranged as 

 follows : anterior, 7 — 10 ; anterior laterals, 16 — 20 ; posterior laterals, 11 - 14. In 

 addition to the above there are numerous other spinnerets or pores arranged in three 

 interrupted, perpendicular rows, of these I counted no less than 140 in a single 

 specimen. There are also some large elongated pores near the margin, arranged as 

 shown in fig. 4. There are three pairs of well developed lobes, median pair largest, 

 divergent, emarginate on inner margin ; outer margin curved outwardly, ends 

 slightly indented; 2nd and 3rd pairs bifui'cated ; the lobules nearly equal; the 

 spines and plates are arranged as shown in the illustration (fig. 4). 



Scale of the <? with a central carina only, margins almost flat ; basal portion of 

 the same colour as the scale of the $, apex lighter; exuviae pale yellow-brown. 

 Scales in a compact mass, occupying one side of the plant, and but few with the 

 females which covered the opposite side of the plant. Looked at in a mass they 

 appear of a pale brown colour. Long., 1 mm. 



This species closely approaches D. cacti, Comstock (Report, 1883, 

 p. 91, fig. 11), but there is no mention of the "numerous spinnerets 

 or pores " arranged in perpendicular rows, or of the elongated pores 

 near the margin ; were it not for these, I should refer the species to 

 the above, but I take it that these are of specific importance. De- 

 scribed from thirteen ? and many scales. 



Hab. : on Opuntia elongata. 



On Ficus lengJialensis and Anona squarrosa (sugar apple) 

 quantities of Aleurodicus anonce, Morg. The leaves of the former 

 were completely covered with the beautiful long glassy filaments of 

 the pupse, presenting a very pretty appearance. 



Ischnaspisfiliformis, Doug. — Many specimens on leaves of Magnolia grandiflora. 



Diaspis Boisduvalii. — Abundant on a Catasetum (Orchid). 



Prosopophora dendrohii, Doug. — Very numerous on stems of Croton. 



Lecanium legonice, Doug. — A few $ on leaves and stems of Begonia. 



EXPLANATION OF PLATE III. 



Aspidiotus coccotis, ? , fig. 1, mai'gin of last segment. 



„ affinis, ? , fig. 2, „ „ 



Dactylopius nipcB, ? , fig. 3, antenna ; 3a leg ; 36, anal lobes, ventral ; 3bb, anal 



lobes, dorsal view ; 3c, anal ring. 

 Diaspis opuntice, '^ , fig. 4, margin of last segment, 



Chester : January, 1893. 



