88 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 60. 



short tubular, of moderate size, one opening just inside second lobe, 

 and with a short spinelike marginal projection opposite it, then 

 with two in a group, one inside, one anterior to the rudimentary 

 third lobes, and after an interval two more; dorsal pores placed in 

 definite closely set rows, inner with three to four, posterior group 

 of second roAv with about 6-8, anterior group with 5-6, third row 

 with about 7 in posterior group and 6-7 in the anterior; ventrally 

 with a number of micropores, the ducts of these rather short and 

 stout, the exact number and position of these not determinable from 

 Maskell's type slide ; with two widely separated, small, dorsal setae 

 on each side, these above and within the posterio-lateral parageni- 

 tals; ventrally with small submarginal setae opposite the marginal, 

 and with a pair of smaller setae within and opposite each space 

 between the anterio- and posterio-lateral paragenitals ; perhaps with 

 others anterior to these, but not definitel-f discernible in the material 

 examined; p^^gidium, while somewhat chitinized, without basal or 

 ventral thickenings; with faintly defined, long triangular, dorsal 

 thickenings running in from the posterior margin opposite the first 

 two pairs of lobes. 



Intermediate stage female. — Essentially similar to the adult, dif- 

 fering principally in the absence of the paragenitals and in the re- 

 duced size and development of the pores, etc. 



Larva. — (Of Poliaspis, species, but not included in the Maskell 

 slide mount ; included for the sake of the greatest possible complete- 

 ness.) Oval, antennae 5-segmented, the terminal not annulate; dor- 

 sally at apex with a pair of double, heavily chitinized, tubular ducts ; 

 legs normal; apex of abdomen with a pair of long apical setae be- 

 tween which are a pair of triangular projections, similar in shape to 

 gland spines, but apparently without internal ducts, and with two 

 small setae, outside of which are two well-developed but tiny lobes 

 and between these a relatively large gland spine, then outside the 

 second lobe another gland spine, followed by several much smaller 

 ones on the margin of the abdominal segments, a pair to each. 



Eight species have been placed in this genus in addition to the 

 type. These appear to the writers to belong to at least three and 

 possibly four different groups. P. pini Maskell is quite obviously a 

 member of the Lepidosaphes series. P. canssae Cockerell appears 

 to have its relationships with the group represented by Dinaspis 

 Leonardi. The status of P. exocarpi Maskell, P. 7iitens Fuller, and 

 P. intermedia Fuller is more doubtful, but the writers at present 

 consider their inclusion in this genus as open to question. It is not 

 possible to comment definitely on P. casuarinae Lidgett. So far as 

 may be determined from available material and descriptions, P. 

 argentosis Brittain, P. cycadis Comstock, and P. kiggelariae Brain 

 may be properlv included with P. media Maskell. In examining 



