THE CANADIAN ENTOMOLOGIST. 255 



(2) Lecanium ribis, Fitch. 



This species may be known by its comparatively small size, and 

 6-jointed antennae, with the third joint very long. There are two long 

 hairs almost at the end of the third joint. The derm shows large gland- 

 pits, often in pairs. The insect reminds one of L. /iemisp/iceric?im, but 

 it is a true Eidecanium. It is not confined to Ribes by any means. Dr. 

 Lintner sent me specimens found by Hon. G. W. Clinton, on Ostrya and 

 Carpinus, in Albany Rural Cemetery, June, 1885. These were 3 mm. 

 long, 2 broad, 2}^ high. Just lately, Prof Webster has sent it plentifully, 

 infesting mulberry in Southern Ohio. The specimens are a little larger 

 than usual, but clearly ribis. This attack on mulberry — a tree hitherto 

 very free from insects in this country — is apparently a serious matter, 

 and will doubtless be fully investigated by Prof. Webster. The Z. 7nori, 

 Sign., found on mulberry in the Savoy (Europe), is quite different. 



(3) Lecanium Fitchii, Signoret. 



On wild blackberry, Medina County, Northern Ohio, sent by Prof 

 F. M. Webster. The specimens have 8-jointed antennae. I think this is 

 the most western locality in which the species has yet been found. 



Lecanium quercitroiiis, Fitch. 



Mr. V. H. Lowe sends this on ironwood, but omits to state when it 

 was found. Hitherto it has only been known on oak. The antennse are 

 7 -jointed. The newly-hatched larva is very pale yellowish, with a pale 

 gray dorsal band.* 



Certain forms of Lecanium found on oak and rose at Manitou, 

 Colorado (Gillette), and on rose at Santa Fe', N. M., have given me a lot 

 of trouble, and even now I do not know what to call them. It was at 

 first questioned whether the rose species might not be the European L. 

 rosarum, introduced, but it now seems tolerably certain that such is not 

 the case.f It was hoped that they could be classified by the antennae, 

 but the more specimens examined, the greater grew the confusion, owing 

 to the variability observed. Mr. Joseph Bennett, when a student at the 

 N. M. College, examined these forms and found the antennae thus : — 



*Compare the young of L. FHchii. The lately-hatched young of species of 

 Lecanium differ more or less in appearance. Thus, the living young of Z. armeniacum, 

 Craw, sent by Mr. Ehrhorn from Sta. Clara Co., California, are pale gray mottled 

 with white, with a conspicuous white or yellowish-white dorsal longitudinal band. 

 Miss Tyrell considers armeuiacunt a variety oi pruinosuin, which proljably is correct. 



tit is also quite distinct from Z./r«/«tf5//w, Cig., which Mr. Ehrhorn sends me 

 Oil rose from Mountain View, California. 



