188 Mr. Shuckard^s Monograph of the Dorylidae, 



Triton palustris. (Warty Eft.) 

 ■ punctatus. (Common Eft.) 



Pisces. 

 Perca fluviatilis. (Perch.) 

 Cottus Gobio. (Bullhead.) 

 Cyprinus Carpio. (Common Carp. ) 



Gobio. (Gudgeon.) 



Tinea. (Tench.) 



Rutilus. (Roach.) 



i Leuciscus. (Dace.) 



■ Cephalus. (Chub.) 



— ' Phoxinus. (Minnow.) 



Cobitis barbatula. (Bearded Loach.) 



Esox Lucius. (Pike.) 



Salmo Salar. (Common Salmon.) 



Fario. (Common Trout.) 



Thymallus vulgaris. (Grayling.) 



Platessa Flesus. (Flounder.) A single specimen caught with rod 



and line Dec. 1839, in river Lug, below Mordiford Bridge. 



Anquilla acutirostris. (Sharp-nosed Eel.) "1 t • t 

 ^ . , ^ '^ ^>In nver Lug. 



latirostris. (Broad-nosed Eel.) J 



XXII. — Monograph of the Dorylidae, a Family of the Hyme- 

 noptera Heterogyna. By W. E. Shuckabd, Esq. 



The discovery of an insect that will, I expect, help to clear up the 

 difficulty which has hitherto attended the completion of these genera, 

 as yet consisting of males only, has induced me to undertake the pre- 

 sent monograph. Although the materials with which I entered upon 

 this task were rather scanty, they have grown upon my hands and 

 are now coextensive with the metropolitan collections ; and when 

 we know that these comprise the collections of many individuals, all 

 much attached to the order Hymenoptera, we must conclude that 

 these genera are naturally poor in individuals, although the number 

 of species that I produce far exceed all that have been hitherto de- 

 scribed. In the genus Dorylus three species only have yet been 

 noticed, two African and one Indian, but it is very questionable if 

 one of the African species may not, understood under the name of 

 D. helvolus, consist of many species from that quarter of the globe 

 which constitute the majority of the family, for Africa is evidently 



