SUBFAMILY XYLOCOCCINAE 87 



Ultracoelostoma Ckll. A monotypic genus from New Zealand 

 on Fagus and Phyllocladus containing the species assimilis Mask. This 

 species execretes a slender white filament of wax from three rings of 

 anacerores. 



Cryptokermes Hemp. This genus was described from Brazil on 

 the limbs and trunks of Schinus. The adult female and second stage 

 nymph of the single species, brazilensis Hemp., has the rectum chitinized 

 so as to form a rectal tube from which in the second nymphal stage there 

 is excreted a stiff tube of wax through which honeydew is passed. The 

 mouth-parts are reported as wanting by Ferris in the adult female and 

 as present in all the nymphal stages. The abdoment is provided with 

 six instead of seven pairs of spiracles in all stages. The legs are slender 

 and typical of first stage monophlebids, short and stout, femur and tibia 

 nearly as broad as long, in last nymphal stage; and wanting in the adult 

 female. The caudal end of the first nymph bears four pairs of long anal 

 chalazae. The antennae are clavate and consist of six segments in the 

 first nymphal stage; are short and stout in the last nymphal stage, con- 

 sist of six segments, the segments three or four times as broad as long; 

 and wanting in the adult female. The exuvia of the last nymphal stage 

 serves as a puparium for enclosing the adult female. 



