ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 



30:5 



generally they are confined to the ultimate and penultimate segments of 

 the antennas, and are such that it is easy to trace a transition from the 

 ordinary pointed hairs to the diiferentiated sense-papillse. In addition 

 to these hairs and papillae derived from hairs, there are also integu- 

 mentary tubercles, non-articulated, but of similar sensory nature to the 

 hair-like structures. The main facts in regard to the components of 

 the antennal sense-organs may be summed up in the following table : — 



Pore-canals 



Taste-hairs 

 [on different) 

 parts of > 

 [ the body ) 



Normal pointed 

 hairs 



Undifferentiated 

 sensory hairs 



Sensory papillae 

 ( scattered in 1 



antennal organs > 

 [ iii. and iv. j 



Tubercles 



Tapilloa or Clubs 



Sensory rods 

 /Antennal) 

 (organ iii./ 



Sensory cones 

 JAntennal) 

 (organ iii.) 



Antennal 

 orsan iii. 



In all 

 Collenibola 



In all 

 Onychiuriuaj 



Antennal 

 organ iii. 



Antennal 

 onran iv. 



In most In Dicyrtoma 



Onychiurinse 



In 



numerous 



Collenibola 



except the 



higher 



Entomobryidas 



The author describes and figures antennal sense-organ iii. in each of 

 the sub-families. The remainder of the paper is occupied with a dis- 

 cussion of the systematic position of the genera Tetracanthella Schott, 

 and Actaletes Giard. He finds that the former is most nearly related to 

 the genera Anuropliorus and Uzelia, and should be united with them to 

 constitute the sub-family Anurophorinae, which is to be regarded as in- 

 cluding the most primitive members of the family Entomobryidie. The 

 genus Actaletes is placed in a new sub-family — Actaletinae — of the 

 Entomobryidse. 



Life-History of Clythra quadri-punctata.* — Horace St. John K. 

 Donisthorpe gives an interesting account of the life-history of this 

 beetle, whose larvse are found in spring in ants' nests (Formica ruj'a). 

 When the beetle has emerged from the pupa in the nest, it escapes with 



* Trans. Entom. Soc. London, 1902, pp. 11-24 (1 pi.). 



x 2 



