TEMORA. 227 



and ladnulatus, are mere varieties of one species. This, 

 from the resemblance he fancied he saw in the abdomen 

 of the female, when loaded with eggs, to the tail of a 

 beaver, he has named Monoculus Castor. The caruleus 

 and rubc/is only differ in colour, and the lacinulatus, as 

 shown above, is merely a female charged with spermatic 

 tubes. I have not met with any individuals of a bine 

 colour, all that I have ever examined in this country being 

 either of a transparent hue or of a delicate red. It is a 

 very beautiful species, and is the most elegant of any of 

 this section : cc Son port," writes Jurine, " est elegant ; 

 sa maniere de s'elancer dans la liquide est noble et harclie ; 

 ses mouvements sont libres et faciles ; tout enfin annonce 

 chez lui une superiorite qui caracterise la grandeur de 

 1'espece a laquelle il appartient."* 

 This animal is about 1^ line long. 



Hab. In ponds and slow-running water. Common 

 in the neighbourhood of London, &c., especially in spring 

 and autumn. 



Genus 2 



MONOCULUS, Gunner, Fabricius, Manuel, Gnielin. 



CYCLOPS, Mutter, Latreille, Lamarck, Bosc, Leach, Edin. Euc. 



CALANTJS, Leach, Diet. Sc. Nat. 



Templeton, Trans. Ent. Soc., ii. 



Character. Head consolidated with first segment of 

 thorax. Thorax composed of five, abdomen of three seg- 

 ments. Antenuules two-branched. Legs five pairs, the 

 first four having each a branch of two articulations only. 



; Hist. Monoc. 

 f "Temora," the palace of the ancient kings of Ireland. 



