57 



extensively parasitized in their larval condition by their two most 

 common parasitic enemies, and to these we may ascribe the comparative 

 immunity from later generations of the pest. 



The cabbage curculio, Ceutorhynchus rapce, 1 occurred in myriads early 

 in the season on wild crucifers, but did not attack cabbages at the time 

 when they were planted in gardens. The new generation of beetles 

 attacked cabbage and other crucifers, but these had made such good 

 growth that no trouble was experienced. 



The clover leaf weevil, Phytonomus punetatus, was observed in the 

 latter part of August by the writer, as well as by Messrs. Schwarz and 

 Pratt, in greater numbers than ever seen before in this locality. 



The common rhubarb curculio, Lixus concavus, was similarly abundant 

 early in the season in most fields visited, attacking every plant of 

 rhubarb and dock and puncturing often every stalk and leaf-stalk. 



The zebra caterpillar, Mamestra picta, though reported to occur con- 

 siderably farther south than the District of Columbia, had not been 

 observed by the writer here until the present year, when considerable 

 numbers were seen. 



The plum moth, Grapholitha prunivora, which is somewhat of a pest 

 in Canada and some of our most northern States, was quite abundant 

 the past summer in some orchards, attacking and destroying both plums 

 and apples. 



The imported currant worm, Pteronus ribesii, was also among the 

 injurious species found the present year; but most noticeable of all was 

 the abundance of insects which affect strawberry, blackberry, and simi- 

 lar rosaceous crops. Among these were the oblique banded leaf-roller 

 (Cacoecia rosaceana) ; an allied species, Lozotcenia clemensiana; the rasp- 

 berry sawfly (Monophadnus rubi); the raspberry leaf-roller (Exartema 

 permundana) ; the common strawberry leaf- roller (Phoxopteris comptana), 

 and the raspberry cane-borer (Oberea bimaculata). Most of these were 

 exceedingly numerous and were equally scarce in former years. Some 

 were discovered for the first time the present year on rosaceous crop 

 plants in this vicinity. 



ON SPECIES COMMON TO NORTH AND SOUTH. 



Thus far we have considered insects which are for the most part 

 distinctly Southern, at least in their origin, or that are confined more 

 particularly to the North or are at least more injurious there than far 

 southward. Of the occurrence this year of species which are usually 

 about equally abundant and troublesome in most States of the North 

 and South, I am unable to draw any deduction. On the whole, how- 

 ever, many of these, which include a very considerable portion of our 

 injurious species, were locally scarce, more so than in previous years, 

 but the writer at present finds it impossible to account for this on the 



l The reasons for the retention of the above name for the cabbage curculio will be 

 given in a forthcoming bulletin. 



