2 ADEPHAGA. [Cicindelidce. 



(1. Legs not adapted for swimming; anterior coxaj globular , Amphizoid^ 

 2. Legs adapted for swimming ; anterior coxae conical . • . Pelobiid^. 

 in. Metasternum prolonged behind in a triangular process, the 

 ante-coxal piece entirely wanting ; habits aquatic. 



1. Antennae slender, filiform ; abdomen with six segments ; 



eyes two Dttiscid^. 



2. Antennae irregular, very short; abdomen with seven seg- 

 ments, the first two closely united ; eyes four Gybinid^. 



The above table is perhaps the best classification of the Adephaga that 

 can be adopted in the present state of our knowledge. As, however, a 

 moire simple division may be of advantage to the general student, the 

 following table is added. In this the Pelobiidce are classed for con- 

 venience sake with the Dytiscidte. 



I. Intermediate legs adapted for walking ; two eyes only present, 

 L Upper joints of the antennae pubescent. 



1. Clypeus extending laterally on both sides in front of the 



insertion of the antennae Cicindelid^, 



2. Clypeus not extending so far towards the sides as the 



insertion of the antenna; Caeabid^. 



ii. Antennae entirely glabrous, without pubescence. 



1. Antennae ten-jointed ; posterior coxae furnished with large 



plates, covering a great portion of the abdomen Haliplid-s:. 



2. Antennae eleven-jointed ; posterior coxae without plates . . DYTiscioa;. 



II. Intermediate legs oar-shaped, adapted for swimming ; four 

 eyes present, two on the upper surface of the head, and two on 



the under surface Gteinid^. 



CICINDELID^. 



Head large, eyes prominent ; maxillae with the outer lobe two-jointed, 

 tihe inner usually terminated by an articulated hook ; antennre eleven- 

 jointed, inserted on the forehead above the base of the mandibles ; 

 clypeus extending laterally in front of the insertion of the antenna? ; 

 elytra covering abdomen ; abdomen with the three anterior segments 

 connate, with six ventral segments visible in the female, and seven, as a 

 rule, in the male; legs slender, formed for running; posterior coxse 

 dilated internally, not reaching the sides of the body ; all the tarsi five- 

 jointed. This family is represented in Europe by two genera, Tetracha, 

 which is nocturnal and crepuscular in its habits, and Cicindela, which 

 frequents the hottest and most sunny places ; the nocturnal Manticorina 

 {Manticora, Omus, &c.) also belong to it. The species belonging to this 

 family found in temperate climates are all terrestrial in their habits, but 

 many species occurring within the tropics alight on the leaves of trees. 



CZCINDEIiA, Linne. 



The species belonging to this genus are the most predaceous of the 

 Coleoptera, and the most active ; they are also among the handsomest 

 and most brightly coloured. From the ferocity of their nature, as well 

 as from the spots and stripes with which they are ornamented, they 

 have been called Tiger beetles. They inhabit for the most part hot sandy 



