THE CANADIAN ENTOMOLOGIST. 



75 



Skin thick, strongly chitinized ; cephalic region remarkable for three 

 broad lobes or tubercles, one on each side of the antennae, and one 

 between ; stigmatic spines very obtuse ; antennae eight-jointed, joints 2 to 

 7 measuring in microns: (2) 37, (3) 52. (4) 60, (5) 37, (6) 37, (7) 30; 



Fig. 6.— Antennn of C. Lahillei. 



these antennae are not quite like any others I have seen, but are rather 

 similar to those of C. /ormicarius, scutigera, brachyiirus, purpiirellus and 

 Mexicanus. Legs well developed (see figure) ; tarsal digitules with very 

 distinct knobs, claw digitules incrassate. (The microscopic figures are by 

 Miss Falk.) 



C\ 



Fig. 7. —Leg of C. Lahillei. 



oftOQft 



Fig. 8. — Stigmatic 

 spines of C. Lahillei. 



Hab. — Santa Ana, Argentine (Lahille). The bottle bears this label : 

 "Sta. Ana (Misiones), Liana, No. 10, No. 8 Hem." 



The genus Ceroplastes is evidently derived from some convex 

 Lecaniid type, and from this point of departure presents a series of 

 forms showing the most curious modifications, coincident with the greater 

 development of wax. Some of the recognizable groups are as follows : 



(i.) C. denudatus Ckll., of the Lesser Antilles, which is at first a 

 typical Ceroplastes, but in age loses nearly all of the wax, and looks Uke a 

 Saissetia. 



(2.) Typical Ceroplastes, with convex scales, in which the lateral plates 

 are large and reach the lower margin ; caudal horn usually moderate, and 



