86 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 60. 



Subfamily Diaspinae. 



Genus POLIASPIS Maskell. 

 Plate 5, fig. 3. 



Genotype. — Poliaspis media Maskell. 



Reference.— Fevn^U, Cat. Cocc. World, 1903, p. 243. 



Maskell established this genus on the basis of the type species only, 

 although a number of additional species have been placed in it 

 subsequentl3\ 



The species is represented in the Maskell collection by a single 

 slide, presumably the type one, labeled " female, 2 stages from 

 Veronica, Jan. 1879." There is also some unmounted material in 

 the Maskell collection under No. 27, while the National Collection of 

 Coccidae also contains some material received from Maskell through 

 Cockerell, and supposed to be a portion of Maskell's type material. 

 Such slides as have been prepared from this last and from Maskell's 

 unmounted specimens appear to represent a different species from 

 that mounted by Maskell in 1879. The following specific descrip- 

 tion has therefore been confined to the material on the type slide, 

 and on account of its condition certain details of structure have 

 necessarily been omitted. 



Adult ferndle. — Scale as described by Maskell: body elongate oval, 

 tapering somewhat posteriorly, membranous, except a portion of the 

 pygidium; antennae small, flattened tubercles with one or two long 

 spines; spiracles slender, each accompanied by a close group of 

 pores, the anterior with about 15-20, the posterior with about 12-15 ; 

 margin of head with a few small setae : margins of thorax and ab- 

 dominal segments with a few small setae and with short, small 

 tubular ducts and slender gland spines with broadly expanded bases, 

 these latter extending in from the margin ventrally; hind margin 

 of posterior abdominal segments with a definite row of tubular 

 ducts on each side and another similar row about midway between 

 center and margin, these dorsal; pygidium not especially large nor 

 prominent, not sharply separated from remainder of body, rounded 

 at apex, median lobes large, not contiguous, more or less protrud- 

 ing, strongly diverging, the margins rounded off and finely crenulate 

 in part, lobes joined by a heavy chitinized thickening, and with a 

 pair of sharp, converging setae between the lobes; inner lobule of 

 second lobes smaller, somewhat asymmetrical, the apex rounded, the 

 outer lobule broadly triangular, inconspicuous, the two lobules o^ 

 the third lobes represented only by inconspicuous marginal projec- 

 tions; margin beyond lobes broken, but without distinct teeth or 

 crenulations ; gland spines relatively long and slender, one outside 

 each median lobe, one beyond the second lobes, one beyond the rudi- 



