PODJKID^. 



('.25 



cles, adding that "it is very mnisnal for an articulate animal 

 to have only two spiracles, and their position is still more ex- 

 traordinary, for they open on the under side of the liea»^l, 

 immediately below the antenna, ... on the 

 inner side of the basis of the mandibles." 

 "In the manner of subdivisions the trachere 

 of Smynthurus differ from those of the true in- 

 sects, and agree more closely with the Myrio- 

 poda and tracheal Araclinida, in the fact that 

 they do not often give off l)ranches nor form 

 tufts, but generally divide dichotomously, and 

 run considerable distances without a separa- 

 tion." (Mr. Lubbock, whom we have just 

 quoted, states that Pcqjiyius has no tracheae.) 

 In Smynthurus the ovaries consist, according 

 to Lubbock, of a single egg-tube. On the un- 

 (I'Tside of the abdomen is a sucking tube, slen- Fig. 6i9. 



der and forlved in Smynthurus, but 

 short in Podura, etc., by which the 

 animal adheres to smooth surfaces. 

 In the genus Podura the body is 

 long, with four-jointed antennae, and 

 the flexible spring-tail is short, wliik 

 in Desoria, Avhich is found iii the 

 Alps, the tail is long. The genus 

 Degeeria is known by the ovate bod3-. 

 and basal half of the si)ring equal- 

 ling the fork in 

 length. A species 

 (Fig. 619) closely 

 resembling the European D. nivalis Nicolet, j 

 we have found in summer resting on theM.'!! 

 leaves of the Clematis. The LepidncyrtuH al- ||ijj|,itn;[Mi)f|M'Jf,>W 

 hinos Nic. (Fig. 620) is a minute pearly white Vv!' [''Ml i|W/feif 

 species found in Europe ; its scales (Fig. ^%^.iy\\\fMjif^ 

 621) are thin and with distinct markings. . V 



Smynthurus is short, differing greatly in ^'^"- '^^■ 



form from Podura, and bears a striking resemblMuce to the 

 larva of Coniopteryx. The bod^^ is sbprt, nearly spherical, and 

 40 



