THE CANADIAN ENTOMOLOGIST. 83 



THE cocciD gp:nus eulecanium. 



BY T. I). A. COCKERELL, BOUT-DER, COLO. 



Some years ago I attempted to make tables to separate the species of 

 Etileca7iiuvi. The attempt was not wholl)' successful ; partly on account 

 of the difficulty of the subject, and partly because there are no doubt 

 more names than species in this genus, and the first step should probably 

 l)e to reduce a number to the synonymy. Certain characters of 

 undoubted value could not be used because they were not known for 

 many species ; for example, the characters derived from the males and 

 the larvae. The minute characters described by Mr. Thro, of Cornell 

 University, are in the same case ; but their value is rather uncertain for 

 closely-allied forms. The forms separated by Mr. Thro were nearly all 

 widely separated otherwise — in fact, of different genera as we now under- 

 stand them — and hence it remains to apply his test to a more difficult and 

 closely-allied series. 



The tables are presented herewith, not because they are perfectly safe 

 guides to the identity of the species, but rather because of their value as 

 indicating groupings, and suggesting the lines of future work. They will 

 at any rate save some trouble in going through descriptions. When a 

 name occurs twice, the species is variable, 

 (i.) Long. io-ii^2i lat. 6-9)4 mm. 



(a) Larger as a rule, dark red-brown, with white powder ; antennae 



7-jointed caryce. 



(b) Not over lo mm. long ; brown, sometimes varied with yellow; 



antennae 6-jointed aceris. 



(2.) Long. 8-9 mm. 



(a) Convex ; antennae 6-jointed. 



(i) Legs rather slender pyri. 



(ii) Legs short and robust ; scale reddish-brown, sometimes 



mottled with yellow {pyri is darker and not 



mottled). 



(b) Tibia equal to tarsus, fide Signoret aceris. 



(bb) Tibia longer caprece. 



{aceris and caprcce are no doubt one species.) 



The distinction oi pyri and aceris is further confirmed by the 

 males : 



(i) $ yellow, with wide brownish thoracic band Pyri- 



(ii) $ light reddish- brown, with darker band on thorax ; 

 abdomen, antennae and legs yellowish aceris. 



March, 1906 



