ISOTOMA. 169 



Isotoma viridis. 



Podura viridis, Mullei\ Zool. Dan. Prod. 



Isotoma — Bourlet. Mem. Soc. Roy. Lille, 1839. 



— ccerulea, „ „ „ „ 

 Desoria virescens, Nicolet. Mem. Soc. Helv., 1842. 



— pallida, „ „ „ „ 

 Podura viridis, Bourlet. Mem. Soc. Roy. Douai, 1842. 

 Seterotoma chlorata, Gervais. His. Ins. Apteres, vol. iii. 

 Desoria pallida, 



— virescens, 

 Isotoma viridis, 



— ccertdea, 



— Desmarestii, 



— virescens, Nicolet. Ann. Soc. Ent. France, 1847. 



— pallida, „ „ „ „ 



Green, witli black eye patches ; pale below ; spring 

 white ; meso- and meta-thorax nearly equal in size ; 

 abdomen widening to the third segment ; body clothed 

 with short hairs. 



Length '1 of an inch. 



Denmark, Switzerland, France, England. 



Isotoma palustris. 



Podura aquatica cinerea, De Geer. Act. Soc. Roy. Ups., 1740. 



— palustris, Mviller. Zool. Dan. Prod. 



— stagnorum. Temp. Trans. Ent. Soc, vol. i. 



— grisea, Burmeister. Handb. d. Entom. 



— palustris, Bourlet. Mem. Soc. Roy. Douai, 1842. 

 (Etheocerus aquaticus, „ „ „ „ 



— — Gervais. His. Ins. Apteres, vol. iii. 



MuUer says, " Podura palustris, lutescens oculis 

 lineaque dor si media nigris ; furca alba." 



Templeton's description is as follows : — " Body 

 elongate, obovate, pale. Head ovate ; eyes black. 

 Antennge not much longer than the head. Thoracic 

 and abdominal rings equal in length, pale, with a 

 greenish transverse fascia occupying the posterior half 

 of each ring, interrupted in the middle, an elongate 

 triangle, with its base at the apex of each ring, occu- 

 pying that part. 



