30 



For sometime past it has been recognized thataLecanium was to be 

 found in the northeastern States on Kubus, but its identification has 

 been a matter of doubt. The chief element in this doubt has arisen 

 from Siguoret's statement that 7>. fitchii was the smallest species known 

 to him, whereas the insect commonly recoguized in recent times is by 

 no means particularly small. 



In July, 1803, Mr. J. Fletcher sent me specimens of a Lecanium on 

 Lawton blackberry, from St. Davids, Ontario. From these I made the 

 following notes at the time: 



Male scale 5™'" loug, 3"'"' wide ; oblong, subcarinate, sides finely rugose, not pli- 

 cate, dorsum shiny ; color, dark chestnut brown ; several of the scales rather sub- 

 globose than oval; sides of some more or less plicate. 



Newly-hatched larvje ocherous-white, with a very conspicuous blackish broad 

 longitudinal band. 



I did not study this species fnrther at the time, but noted that it was 

 allied to and possibly a variety of L. persicw. June 12, 1891, Dr. J. A. 

 Lintner sent me several specimens on a blackberry twig, the locality 

 not being stated. Wishing to clear the matter up, I have made a 

 microscopic examination of them, with the following result : 



Female with antennae 7-jointed ; 2, 3, and 4 long and subequal (3 a little the longer) ; 

 5 and 6 very short and subequal (6 a little the longer) ; 7 a little longer than 6, but 

 much shorter than 4 ; 5 somewhat longer than broad; 1 large and ordinary. For- 

 mula, 3 (24) 1765. 



This is the normal form ; one showed antenna 8-jointed, 4 longest, 3 and 2 equal, 

 5, 6, 7 short ; 8 longer than 5, 6, or 7, but shorter than 2. Legs ordinary ; tibia a little 

 shorter than femur; tarsus decidedly shorter than tibia; tarsal knobbed hairs and 

 digitules filiform. Anal plates extremely small ; their externo-cephalad sides longer 

 than their externo-caudad. Derm tessellate, the plates mostly hexagonal ; gland- 

 spots as in other species. 



The eggs found uuder a female are slightly tinged with pink. As 

 Dr. Lintner observed, the scales when removed from the twig leave a 

 curious and pretty pattern of white secretion, consisting of an oval 

 outline, an abdominal patch, and lines indicating the lateral incisions. 



With Dr. Lintner's specimens are some male scales, which are as 

 usual in the genus. 



Now, what are we to call this Lecanium received from Mr. Fletcher 

 and Dr. Lintner? Putting aside 27ersiccc, which I am now convinced 

 it can not be, audjitchii, on account of size, I turned for comparison to 

 the European rubi. Mr. Douglas, in describing r«W, refers to the white 

 markings of the females, which last until oviposition is completed. 

 After that the scales become uniform nut-brown. Herein the species 

 shows resemblance to L. juglancUs Bouche, with its disappearing yel- 

 low marks. I have not seen the American blackberry scale in the 

 proper condition to say whether it has the markings as described by 

 Mr. Douglas, but certainly on Dr. Lintner's examples the dorsal band 

 is obscurely indicated, and the transverse marks seem to have been 

 more or less distinct. So far, therefore, the evidence is inconclusive 



