Insects. 544 1 



Dyschirius aeneus, Dej. D. thoracicus, D. tristis, D. pusillus, 

 Steph. On muddy banks of ditches at Privet. 



Pogonus chalceus, Marsh., Steph. P. littoralis, Steph. Abundant 

 under debris in the Salterns, Island of Portsea, and in a salt-marsh 

 near Fort Monkton. 



Curtonotus spinipes, Linn. C. aulicus, Panz., C. piceus, Steph. 

 Under stones along Stokes Bay. 



C- convexiusculus, Marsh. At roots of grass in a damp bank at 

 Grange. 



Ophonus pubescens, Pay k., Steph. Not abundant; under stones 

 on Southsea Common. 



O. obsoletus, Dej. During September and October this species has 

 been taken by the authors in some abundance in the Salterns, Island 

 of Portsea. 



HYDRADEPHAGA. 



In this and the following section the authors have to express their 

 obligations to Dr. Power, who has kindly determined for them many 

 of their doubtful species. The arrangement followed is that of Daw- 

 son and Clark's recent Catalogue. 



I. Fam. Dytiscidje, Leach. 

 1. Sub-fam. Dytiscincs. 



1. Dytiscus, Linn. Dyticus, Geoff., Steph. 



D. marginalis, Linn., Steph* D. submarginalis, Steph. Common ; 

 in ponds. 



2. Acilius, Leach. 



A. sulcatus, Linn., Steph. Abundant ; in ponds. 



2. Sub-fam. Colymbetince. 



3. Colymbetes, Clairv. 



C. fuscus, Linn. C. Paykulli, C. striatus, Steph. Very common ; 

 ponds and ditches. 



C. pulverosus, Sturm., Steph. C. conspersus, Gyll., C. notatus, 

 Lacord. (not Fabr.) Tolerably common ; ponds at Hillhead, and in 

 ditches near Portsea Salterns. 



XV. O 



