132 THE CANADIAN ENTOMOLOGIST. 



four lateral rows of pores, and the external row composed of i6 to i8 

 pores. 



A. jiiglandis is said to have the scale reddish, in the Las Graces form 

 it is brown, in y«^/d!«.f-r^^/(K pale grayish-brown. I have been much in- 

 clined to suppose that juglandis and juglans-regim are but forms of one 

 species, but have not the material to prove the point. If so, our Las 

 Cruces scale must belong to the same species. 



For the sake of distinguishing our form, it may be well to describe it 

 thus : — A. Juglatis reglx van no v. pruni. 



$ Scale varying from very pale brown to decided brown, second skin 

 sometimes dark brown. Exuviae apparently covered by a fine layer of 

 secretion, mostly rubbed off in our specimens ; second skin large, broadly 

 oval or sub-circular, not pointed ; first skin more or less exposed, orange 

 Shape of scale circular or nearly so ; diameter, 2)^ mm. 



9 Yellow, oval. Median lobes rather large, blunt and rounded, close 

 together, notched outwardly. Second lobes smaller but of fair size, also 

 notched outwardly. Third lobes obsolete. Pairs of spine-like plates at 

 intervals along the margin. Caudolateral groups of glands of from 5 to 7, 

 cephalolaterals of from 6 to 7, median group represented by a single orifice. 



(^ Scale, colour of $ scale, but smaller and elongate. 



Hab. on twigs of plum. Las Cruces, N. Mex., May 8. (Townsend.) 



I do not know any species with which this might easily be confounded, 

 except A. ancylus, Putnam, which has a smaller scale, brick-red exuvins, 

 and the second pair of lobes obsolete. 



Feb. 21. — I have just received specimens oi Aspidiotus Juglans-regice, 

 Comst. from Prof. Morgan, of Baton Rouge, La. He sends it on peach 

 and Japan plum, with the statement that " it is new in this section and is 

 doing considerable damage." 



Feb. 25. — Yesterday I found a new vdiutiy oi Aspidiotusjuglans-regioe 

 at Mesilla, N. Mex. : — 



Var. nov. albus. $ Scale flat, 2^ mm. diam , white, with the exuviae 

 orange-red, but covered by white secretion. % yellow, four rows of orifices 

 marking the obliterated segments of terminal portion ; ventral glands 

 present, median single, cephalolaterals g, caudolaterals 10. Marginal 

 spines and plates inconspicuous. On bark of pear trees, not very 

 numerous. 



Should this hereafter be considerd a distinct species, the varietal name 

 now given may stand for it ; but notwithstanding the white colour, which 

 seems quite constant in the Messilla specimens, I have no doubt in my 

 own mind that the insect is a variety of Jag/ansregics, with which it 

 appears to agree in all really essential characters. 



