SCALE-INSECTS (COCCIDAE). PART II, 



:ioy 



highly protected and inconspicuous. Larval pellicle (not buried beneath the 

 bark) placed centrally, colour red, or dull orange red ; second pellicle dull 

 castaneous. Under surface black, smooth, but with a thin pearly grey secretion. 

 Ventral pellicle thick, greyish, with a well defined black margin and a subcentral 

 circular white patch, between which and the margin the sublying blackish 

 secretion shows through in fine dark and somewhat concentric lines. Greatest 

 diameter, 2*50 mm. 



Female adult. — Very broadly ovate or rotund. Thorax deeply constricted and 

 with a few scattered hairs ; integument strongly chitinised. Rudimentary 

 antennae with a single long straight hair not much larger than the scattered hairs 

 on the surrounding integument. Parastigmatic glands present near all the 

 stigmata : anterior pair usually with four, posterior pair with one or two. 

 Second and third abdominal segments with a large group of minute tubercular 

 spinnerets near the margin ; the remaining segments as also the proximal portion 



Fig. 6. — Pygidium of adult 9 of : a , Aspidiotus (Pseudaonidia) fossor, Ncwst. ; 



&, A. tesseratus, de Charmoy. 



of the pygidium with a continuous band of similar spinnerets. Pygidium 

 reticulated ; without circumgenital glands ; anal orifice placed a little in advance 

 of the median pair of " thickenings of the body-wall " ; the latter in two pairs 

 are almost straight and of uniform thickness throughout ; margin (fig. im) with 

 three pairs of lobes and two pairs of dentate projections, the latter generally 

 larger and therefore more conspicuous than the lobes ; spines and squamae very 

 short, the latter, as a rule, do not project beyond the lobes, or if so, only very 

 slightly. Length 1*50 mm. 



Barbados : Queen's Park, on grape vine, 21. i. 13 (J. R. BovelT). 



This Coccid possesses the power of burrowing beneath the bark of its food- 

 plant to the same marked extent as Ckionaspis (Howardia) bid avis, Comst. In 

 its structural characters it very closely resembles Aspidiotus (Pscudaonidia) tesse- 

 ratus, de Charmoy, but has relatively much shorter spines and squamae ; the 

 thickenings of the body-wall are longer and of uniform width throughout ; and 

 the dentate projections of the margin of the pygidium are also much more 

 markedly pronounced. 



Aspidiotus (Pseudaonidia) tesseratus, de Charmoy. (Fig. 6b). 



Barbados : Dodd's Botanical Station, on Cassia fistula, 1913 (J. R. Bovcll). 



