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92 THE CANADIAN ENTOMOLOGIST. 



the leaves. These resulted from the folding over of the edge of the leaf, 

 or sometimes both edges, forming a pocket in which were many aphides ; 

 wingless forms, pupae with wing-pads, and young. No such gall has ever 

 been found in Europe or Asia, and it is highly probable that we have an 

 endemic American form confined to the bearberry. 



The wingless forms ( 9 ) are broad pyriform, subtruncate behind 

 about 1,350 /i long and about 900 broad ; appearing black, but really 

 dark olivaceous, obscurely marked on the back with black; body, antennae 

 and legs very sparsely hairy ; beak not reaching middle coxa8 ; cauda 

 broadly rounded ; antennae 4-jointed, 3 and 4 annulate ; 3 much the 

 longest. 



The pupae are about 1,200 /x long, deep olive-green ; beak not reach- 

 ing middle coxae ; antennae six-jointed, 3 much longest, then 6 (the last 

 two-fifths of which is narrowed); 4 and 5 cylindrical, about equal, together 

 hardly as long as 3 ; 2 about as broad as long, its sides bulging. Larvae 

 greenish-yellow. 



This insect may be called Pemphigus Coweni, in remembrance of 

 Mr. J. H. Cowen's work on Colorado Aphididae. 



Cowen (Hemiptera of Colorado, p. 125) reports an aphid, which he 

 describes but does not name, in galls on bearberry. I supposed that it 

 must be the same as mine, but his description mentions honey-tubes, 

 which are absent in my insect. His statement that the antennae of the 

 pupa are 7-jointed may possibly be due to the custom of counting the last 

 joint as two. 



CALIGRAPHA (CHRYSOMELA) PNIRSA. 



It may be of interest to Coleopterists to know that the beautiful 

 Chrysomelid, Caligrapha piiirsa, has been taken in considerable numbers 

 at Rochester, Minnesota. One specimen was captured on May 30th, 

 1902, and another one seen, but not until the present year were more 

 found. At the suggestion of Mr. Frederick Knab, of Urbana, 111., who 

 determined the species for me, I made careful search about basswood 

 trees, and on May 30th, 1905, under the leaf-mould beneath these trees I 

 unearthed a number of fine examples. A few weeks later others were 

 taken as they were ascending basswood trunks about dusk, emerging from 

 the ground apparently only under cover of darkness. I have been unable 

 to find larvae, nor has there been a trace of the species here since June. 



If I have been correctly informed, this is the first authentic discovery 

 of the species within the limits of the United States, although it is reported 

 from several localities well north in Canada. It seems singular that a 

 colony of a tree-inhabiting species so large and so well marked as C. pnirsa 

 should be discovered here in the midst of a prairie country, unless, as may 

 appear later, it exists in neighbouring States but has been overlooked. — 

 Chas. N. Ainslie, Rochester, Minnesota 



Mailed November ist, 1905. 



