Mr. J. W. Slioebothaiu's Notes on Collembola. 427 



restricted for the single genus Podura. The second section 

 Entomobryomorpha, vvliich corresponds to the old Entomo- 

 bri/ida, was also split into three ; the name EntomobryidcB 

 was retained for those species possessing the Trochanteral 

 organ, and the rest divided into two new families, Isutomidce 

 and TomoceridcB. The Sminthuridce and Neelidce remained 

 as before. 



This classification gives us 8 families, and it may seem 

 a large number for so small an order, but there are many 

 districts in the world that have never been searched for 

 springtails, and others in only a haphazard manner, and, 

 doubtless, when the group has been more thoroughly 

 worked, there will be hundreds of new species discovered, 

 which will result in the formation of new genera, and probably 

 of the larger divisions also. 



As an example of how a tribe has increased in size and 

 importance in recent years, take the Cyphoderini. This 

 tribe for many years contained only the one genus Cypho- 

 derus, Nicolet (1812), and that genus, as we know it to-day, 

 contained only two or three species up to the end of the 19tli 

 century. Now, as a result of collections made in various 

 parts of the world, there are the additional genera, Cyphn- 

 derodes of Silvestri (1911), Pseudocyphoderus, Irams (1912), 

 the peculiar genus Calobatella described by Borner (1913 «). 

 The genus Cyphoderus now contains a dozen or more species, 

 with the probability of the number being increased in the 

 near future. 



Synopsis of Suborder's, Sections, Families, Subfamilies, and 

 Iribes of the Order Collembola, taken from Borner 

 (1913 6), pp. 318-322. 



A. Body flattish-cyliudrical, elongated, as a vide distinctly segmented, 

 with free thoracic and free abdominal segments ; rarely the 

 abdominal segments 5 and 6 or 4-6 are fused together. 



Suborder Arthropleona, C. B., 1901. 



I. Terqum of the prothorax similar to the terga of the other body- 

 seyments, always, as in the case of these, possessing some hairs, 

 Furcula present or absent, in the first case lying under abdominal 

 terqum 4. Integument generally granular, mostly soft, seldom 

 with stouter chitinized sClerites. Ventral tube always short, 

 pocket-like, smooth-walled. Manubrium ventrally always without 

 hairs. Section Poduromorpha, (y. B., 1913. 



a. Without pseudocelli. With or without eyes. Sensory organ ot 

 the third antennal segment only with sense-rods, without 

 sense-cones, without outer papilla?. Fourth antennal segment 

 without subapical sense-pit, always with retractile sense-knob. 



28* 



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