88 EGBERT NEWSTEA.D — -OBSERVATIONS ON 



Mytilaspis citrieola, Packard {=M. becMi, Newm.). 



On Citrus; Entebbe, Uganda, 3. 11. 1910 (C. C. Goiodey). 



Chionaspis longispina, sp. n. 



Female puparium. — Varying from broadly ovate to elongate, and usually 

 broadest immediately behind the exuviae or pellicles. The general colour of 

 the scale is pale translucent grey ; but many examples are bright ochreous brown, 

 and there are also colour varieties intervening between these two ; the puparia 

 are, however, so completely concealed beneath the superficial layer of the bark 

 of the food-plant that the true character of the secretion is rendered almost 

 invisible. Pellicles dull yellow or orange yellow. Length, 1-1-25 mm. 



Female, adult. — Form broadly ovate, the cephalo-thoracic region being as wide 

 as the free abdominal segments. Kudimentary antennae with a single strongly 

 curved and deeply forked spine. There are, apparently, no parastigmatic glands. 

 Pygidium (fig. 3), strongly produced and furnished with two pairs of lobes ; the 

 median pair large, and, in well preserved specimens, tridentate on the anterior 



m 



k\ 



V 





Fig. 3. — Chionaspis longisjpma, Newst. ; margin of pygidium of adult female. 



lateral margin, the dentations being broadly rounded ; second pair of lobes small 

 and dentate on the outer lateral margin only. Squamae more or less rudimentary. 

 Spines very long and slender, with the exception of the median pair which are 

 minute and do not reach as far as the tips of the lobes. Body-wall with one 

 bilateral pair of incisions, each surrounded by a circular patch of dark chitin. 

 Circumgenital glands three to four in number, arranged in a single curved row. 

 Anal orifice towards the margin of the pygidium. Sexual orifice almost centrally 

 placed. 



On Justieia alba; Ghezireh, Egypt, 2. IX. 1910 (F. C. Willcocks). 



The distinguishing characters of the female are the long slender spines on the 

 pygidium ; the curious form of the antennal spines ; and the absence of grouped 

 circumgenital glands. 



The " mining " habits of the female are rather striking, though many species 

 insinuate themselves beneath the living cuticle of their food-plants, so much so 

 in Chionaspis hiclavis, Comstock, as to i-ender the puparium quite invisible. 



Scattered among the females were a number of male puparia which from their 

 general form and colour are, I believe, referable to the genus Parlatorla, ancl 



