79 

 SCALE INSECTS ON AMERICAN FRUIT IMPORTED INTO GERMANY. 



[Abstract of a paper by Dr. L. Reh. 1 ] 

 INTRODUCTION. 



Extensive scientific investigations could not be made during the first 

 winter of the existence of the station, and the present publication is 

 confined to some statistical notes based upon a careful count of the 

 scale insects found on American fruits. As a matter of course, only a 

 small fraction of the inspected fruits could be made the basis of the 

 following enumeration : 



I. INVESTIGATIONS. 



DISTRIBUTION OF COCCLDS ON THE SURFACE OF FRUITS. 



As a general rule Coccids are found on the protected places of the 

 surface of fruits; in stone fruits, therefore, in the stem cavity, but also 

 on the stem; in pears and apples the flower cavity and the calyx cavity 

 are favorite living places; in apples, in addition, the deep stem cavity, 

 Aspidiotus perniciosus alone occurs frequently on the unprotected sur- 

 face of pears. 



I have counted on pears: 



Male, 



Female. 



Chionaspis furfurus Fitch 

 In the calyx cavity . . . 

 In the flower cavity. . . 

 Near the flower cavity. 



On the side .'. 



Around the stem . . — 

 On the stem 



Total 



Similar tables follow regarding 6 other species, which it is not neces- 

 sary to print in detail, but which may be summarized as follows: 



Aspidiotus ancylus Putn., 259 specimens. 



Aspidiotus forbesi Johns., 17 specimens, all in the cavity of the flower. 



Aspidiotus perniciosus Comst., 757 specimens. 



Aspidiotus camellia Signoret, 115 specimens. 



Chionaspis furfurus Fitch, 52 specimens. 



Mytilaspis pomorum Bouche, 59 specimens. 



This last-mentioned species proved to be quite aberrant. On the free 

 surface there were 20.34 per cent of the specimens and none whatever 

 in the flower cavity, which is so favored by the other Coccids. 



1 This paper of Dr. Reh's, entitled "Untersuchungen an Amerikanischen Obst- 

 Schildlausen," was published recently in the " Mittheilungen aus dem Naturhis- 

 torischen Museum," Volume XVI, and as it summarizes a lengthy series of careful 

 observations, points a moral to American exporters of fruit, and shows plainly the 

 importance to our entire fruit industry of sending abroad only perfectly clean fruit, 

 this abstract in English has boen drawn up at my request by Mr. E. A. Schwarz. — 



L. O. H. 



