SUBFAMILY CONCHASPINAE 215 



than one-half the length of the body. Green was unable to follow 

 the life history of the male, but found some nymphs in their cocoons 

 that were oval in outline, still retained their nymphal legs, and 

 bore antennae consisting of four segments. 



Our knowledge of the development of the female is very lim- 

 ited. Newstead states that the nymphs of the first stage resemble 

 the adult female except that they are smaller. They are short 

 and ovate in outline and have antennae of six segments, of which 

 the two distal segments are the longest. The legs lack the tibio- 

 tarsal suture as in the adult female but differ in that there are 

 two tibial and two ungual digitules present. The abdominal seg- 

 ments are also provided with plates. The three genera of this 

 subfamily can be separated by means of the following table : — 



GENERA OF CONCHASPINAE 



a. Body of adult females not with broad multidenticulate projections; 

 dorsum of caudal end of abdomen not with thickened plate-like pro- ' 

 jection on each side of meson; setae of lateral margin of each seg- 

 ment long, in groups or two or more. 



b. Abdomen with caudal end projecting, not with anal lobes bear- 

 ing setae; tergum of thorax with ventral aspect never with con- 

 tinuous marginal fringe of setae Conchaspis Ckll. 



bb. Abdomen with caudal end deeply hollowed out, hollow bounded 

 on each side by a prominent anal lobe bearing one long slender 

 seta and three short stout setae; tergum of thorax with continu- 

 ous fringe of short setae Scutare Brittin. 



aa. Body of adult female with three broad, multidenticulate, pectinae- 

 like projections; dorsum of caudal end of abdomen with thickened 

 plate-like projections on each side of meson; each plate with row 

 of three short setae; lateral margins of segments apparently with- 

 out setae; caudal end of abdomen truncate, bearing near margin six 

 ventral and four dorsal setae Fagisuga Lindinger. 



Conchaspis Ckll. — This genus with its four described species is 

 placed between the Phenacoleachiinae and Dactylopiinae by Mrs. 

 Fernald in her Catalogue. Green and Newstead place it before or after 

 the Diaspidinae, a more logical location it would seem. The species of 

 this genus can be separated by means of the following table: — 



SPECIES OF CONCHASPIS 

 a. Antennae of adult female with five or six segments, scale of adult 

 female conical but not fluted. 



b. Antennae of adult female with six segments, segments subequal 

 in length; abdominal segments with four groups of cerores, 

 larger number on cephalic segments, with scattered cerores be- 

 tween groups. — Mexico on Plumieria neiosteadii Ckll. 



bb. Antennae of adult female with five segments, two distal seg- 



