April, 1901.] 



81 



OBSERVATIONS ON GOCCIDM (No. 19). 



BY E. NEWSTEAD, P.E.S., 



CURATOR OF THE GEOSVENOR MUSEUM, CHESTER. 



(Continued from 2nd series, vol. xi, page 251, October and November, 1900). 



ASPIDIOTUS ALIENUS, n. sp. 



$ puparium sub-circular, flat, convex ; colour pale purple-brown, margins 



paler ; larval exuviae shining black, secrctionary covering dull brown, forming a 



central point and eoncentric ring. Ventral scale rather strong, and generally 



remains attached to the food-plant. G-reatest diameter, 2 — 2-25 mm. 



? adult pyriform. Rudimentary antenna forming tubercle above basal curved 



hair. Pygidium (figs. 

 1, 2) rather pointed. 

 Lobes in 3 pairs, of 

 which the median pair 

 are sometimes slightly 

 the longest ; the 3rd 

 broadest, have the 

 margins sloping up- 

 wai'ds. Beyond the 

 last lobe the margin 

 ( is produced into 3—4 

 f|^K (usually 3) equidis- 

 tant angular proces- 

 ses, with the margin 

 between them finely 

 crenulated. Plates 

 between the lobes 

 broadly bifurcate. 



Circumgenital glands in 4 groups : anterior laterals of 8 — 9, posterior laterals of 

 8 — 9. Club-shaped glands in pairs, the central, 3rd and 4th pairs being less than 

 half the length of the others. 



Hrtb. : on Caffleija Skinneri, under glass, London. Collected by 

 Mr. E. E. Green, to whom I am indebted for the specimens. 



The form of the puparia, and also the deeply serrated margin of 

 the pygidium somewhat resemble that of Aspidiotus hiformis, Ckll. ; but 

 it is much more closely related to A. scutiformis, Ckll., and A. Boweri, 

 Ckll. It differs, however, from either of the latter by the unusually 

 broadly divergent, bifurcate, plates, and the regular and deeply ser- 

 rated margin, which latter chai'acter resembles the serrations in A. 

 paulistus, Hem pel. 



AspiDioTTJS ARTicuLATUS, Morgau. 

 Aspidiotus articulatus, Morgan, Ent. Mo. Mag., vol. xxv, pi. v, fig. 5, 



p. 352. 



