POTJASPTS CYCADTS. 177 



POLIASPIS CYCADTS, Comstock. 



(PL XV, figs. 18 ; PL XVII, fig. 3 ; PL XVIII, 



fig. 6.) 



Poliaspis cycadis, Comstock; Report, 1883, p. 116, 

 fig. 15. 



Puparium of adult female (PL XV, fig. 2) white, or 

 ochreous white ; elongate and widened posteriorly, 

 widely pyriform or mytiliform. Exuviaa terminal ; 

 those of the larva naked are of a brownish yellow, or 

 pale ochreous; second exuviae covered with a thick 

 white secretion. Ventral scale white. 



Some of the examples from Mr. Douglas' Collection 

 (PL XV. fig. 3) were quite hidden beneath the layer of 

 red woolly filaments of the plant; but these were not 

 firmly attached to the secretionary matter as foreign 

 substances usually are. 



Long. 2 3 mm. 



Adult female (PL XV, fig. 5) elongate ovate; 

 extremities equally rounded. Rudimentary antennas, 

 rather longer than usually found in the Diaspinae, have 

 one or two long curved spines. Anterior spiracles 

 (PL XV, fig. 8) with a long cylindrical stem suddenly 

 and widely dilated at apex, which has three to five 

 spinneret-like glands ; the parastigmatic glands usually 

 number about twelve. Posterior spiracles (PL XV, 

 fig. 7) slender, dilated at base and apex, the latter 

 renif orm ; parastigmatic glands varying from four to six. 

 The dermis at the sides with large tubular spinnerets 

 and conical spines, numerous on the free abdominal seg- 

 ments, but gradually diminishing towards the cephalic 

 segment, where they are almost wanting. Pygidium 

 large and clearly defined ; has eight groups of cir- 

 cumgenital glands, of which the three anterior are 

 additional to the five groups usually found in the 



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