1887.] 



21 



NOTE ON SOME BRITISH COCCIBM (No. 7). 

 t BT J. W, DOUGLAS, F.E.S. 



; ISCHNASPIS, n. g. 



? scale very long and narrow, sides parallel, larval exuviae with a fringed 

 margin, followed by two moults, of which the latter is very long : pygidium without 

 spinerets in groups, but having a design of irregular lattice-work, composed apparently 

 of thickening of, or under, the integument, in that pattern. 



^ scale not half the length of the $ , of like form, but only one moult beyond 

 the larval exuviae : imago not known. 



ISCHNASPIS riLiroEMis, n. sp. 



Fig. 3. 



? scale jct-blaek, shining, straight, filiform (Fig. 1) ; larval exuviae oval, small, 



ochreous, witli a concolorous, small, flat, angularly-lobate marginal fringe (detached, 



Fig. 2) ; the third pellicle at least twice the length of the second, widely rounded 



at the extremity, the successive minute increments of development perceptible 



throughout the scale : pygidium occupied with a lattice-work formation of irregular 



pattern, similar but not quite identical in all examples, yet on the posterior portion 



always alike ; a few isolated spinnerets near the margin : posterior margin with two 



median, distant, large, posteriorly rounded lobes, then on each side one smaller 



curved outwardly, and then another larger, but not so large as the median, with a 



small one adjoining ; some small spines between the lobes and five or six large ones 



beyond, the margin there having dentate plates (Fig. 3). 



Length, 3 — 3"5, breadth, 0' 10 mm. 

 $ scale narrower and not half the length. 



The figures are from pboto-transfers of camera-drawings by Mr. 

 G. S. Saunders. 



Altogether one of the most remarkable forms of Diasphia that I 

 know, both in respect of the scale and the character of the pygidium. 



Abundant in the conservatories of the Royal Botanic Society on 

 the leaves of various palms, Strychnos, My^'istica, and other plants, 

 looking like little bits of silk thread accidentally affixed. 



Mytilaspis pinn^foemis. 



Aspidiotus pinnaformis, Bouche, Stett. ent. Zeit., xii. 111, 5 (1851). 

 Mytilaspis pinncpfonnis, Sign., Ess. Cochin., p. 141, pi. vi, figs. 4 and 8. 



