146 KERMES QJJERCUS. 



The length of the pedunculate d, or attenuated, 

 anterior extremity of the adult female is evidently 

 determined by the depth of the crevice in the bark 

 in which the larva first fixes itself; should the 

 crevice be shallow and narrow the peduncle is corre- 

 spondingly short and slender ; in instances where the 

 crevice is comparatively broad and deep the body is 

 more gradually attenuated, and the shape not unlike 

 that of a miniature grain of maize ; on comparatively 

 smooth bark the peduncle is extremely short, and the 

 body almost spherical. 



Distribution. Outside the British Isles it has been 

 found only on the continent of Europe. It had, appa- 

 rently, been lost sight of for nearly a century, when it 

 was re-discovered by Dr. K. Sulc at Jfebori, Bohemia, 

 in July, 1897. Shortly afterwards it was taken by 

 Karl L. Kafka, I believe near Vienna ; and in Sep- 

 tember, 1899, Dr. L. Reh found examples at Borstel, 

 near Hamburg. I am much indebted to all three 

 collectors for a series of specimens, which are specifi- 

 cally identical with those found in this country. 



EXPLANATION OF THE PLATE. 



PI. F, figs. 1, la, I b. Very slightly enlarged photo- 

 graph of old adult females in situ on oak bark. 

 The females opposite figs. 1, la are quite naked ; 

 those opposite fig. 1 b, and five others in the 

 central crevice, are partly or wholly covered in 

 cereous matter. 



Fig. 2. Two male puparia ; the lower one shows 

 the exit hole of a chalcidid parasite. 



DACTYLOPIIN^E. 



Adult females active or stationary, naked or covered 



with mealy, cottony, waxy, horny, or glassy secretion. 



Antennas and legs either well developed, rudimen- 



