14 PROCEEDINGS OF THE NATIONAL, MUSEUM. vol. 60. 



derm with one type of multilocular disk pore and simple slender 

 setae; anal opening a short simple tube; ventral cicatrices want- 

 ing; intermediate stage female nearly globular with apex of ab- 

 domen chitinized; antennae and legs reduced as in adult; nientum 

 long triangular, 2-segmented; derai with bi- to quadrilocular disk 

 pores, large and small clear circular pores, these ventrally at least, 

 and comparatively few slender setae; with spiracles as in adult, 

 J3ut each with one or two pores; anal tube long and stout, with 

 median and interior rows of pores; chitinized apical area bearing 

 threadlike setae, one pair of large setae and the posterior spiracles 

 in addition to the anal tube ; no ventral cicatrices ; larva oval ; an- 

 tennae short and stout, 6-segmented; legs stout, normal, claw with 

 denticle and digitules; mentum as in intermediate stage; spiracles 

 as in preceding stages, but simple; derm with bi- to quadrilocular 

 disk pores and simple pores, and with some slender setae; apex of 

 abdomen chitinized, this area bearing threadlike setae, one pair 

 of long apical setae, and some pores ; anal opening in center of this ; 

 anal tube long and stout, with pores as in intermediate stage but 

 less developed; no ventral cicatrices. 



The present confusion among the genera in this group is so great 

 that it is practically impossible to place this genus with any degree 

 of certainty. Except for the reduction of the legs and antennae 

 and the failure of the adult to become active at maturity, other 

 structural characters and habit indicate a closer relationship to 

 Xylococcus than to any other genus at present known to the writers. 



Subfamily Phenacoleachiinae. 



Genus PHENACOLEACHIA Cockerell. 



Plate 1, fig. 3. 



Genotype. — Leachia zealandica Maskell. 



Reference.— F^rnsild, Cat. Cocc. World, 1903, p. 38. 



This is another one of Professor Cockerell's genera based on a 

 single species. It is represented in the Maskell collection by eight 

 slides, one of " larva, 1889," one of " adult female, 1889," one of 

 "antenna of female, 1889," one of "foot of female, 1889," one of 

 " adult male, 1889," one of " semi-apterous male, 1890," and two of 

 " adult female," one marked " Capleston, 1891, R. W. Raithby." 



As the species has been described in detail by Maskell, the follow- 

 ing descriptive notes may be regarded as supplemental to his work. 



Adult female. — Elongate, the ends of the body tapering and 

 rounded; antennae with a single stout sickle-shaped seta on a num- 

 ber of the terminal segments besides the pair on the apical one ; legs 

 with the chitinous attachment piece very long and slender, claws 



