650 jMr. I'^, Srumclcrs' S^//jioj)sis of 



Smaller P-peciep. 



19. mmsta, Fleb. Fig. Spec. Coris. pi. ii. fig. 17. 



A short, obsciircly-niarkcd species, -with a very short 

 thorax and large head; at once distinguisliable by the form 

 of the intermediate legs, Avhich have the tarsi only very 

 slightly shorter than the til)iiv, and the claws subcqnal to 

 the tnrsi. 



Length 2 ^ lines. 



Common in ponds, &c. 



20. Fahricii, Fieb. Fig. Spec. Coris. pi. ii. fig. IG 



(pala.). 

 = nigrolineata, Fieb. 

 = perplex a, D. & S. 

 = burcalis, D. & S. 

 = Whiter, D. & S. 

 = decora, D. & S. 

 = duhia, D. & S. 

 Moderately rastrate, more or less shining ; brownish- 

 black, Avitli pale markings. 



A very variable species in colour; but I can detect no 

 structural character to separate the varieties from each 

 other. Nigrolincaia is the palest var., horeoUs the darkest. 

 This species is separable from its allies by the short, rather 

 wide, smooth tubercle on the anterior margin of the 

 thorax. 



Length 2^ lines. 

 Not rare; in ditches, &c. 



Mr. Douglas, in Ent. Mo. Mag. 1875, Nov., unites 

 decora and perplexa Avith Whitei, and duhia Avith nvjroli- 

 neata. Dr. J. Sahlberg, in his " Synopsis Amphibico- 

 risarum," &c., unites decora and duhia Avitli Fahricii and 

 nigrolineatu. I feel little doulit, hoAvever, that I am right 

 in referring all these varieties to one species. 



21. limitata, Fieb. Fig. Spec. Coris. pi. ii. fig. 20. 



A pale species, Avith A'ery distinct black markings ; 

 longer and narroAver than the preceding ; the markings on 

 the corium interru])ted near the inner apical angle by tAvo 

 black, longitudinal lines ; intermediate claws very long, 

 as long or longer than the tibife. 



Length 2| lines. 



Common in ditches, ponds, &c. 



