A HISTORY OF HERTFORDSHIRE 



} Tring 



Haliplus mucronatus, Steph. Hertford (Ste- 

 phens) 



flavicollis, Sturm. Wihtone, in the 



reservoir 



fulvus, F. Wigginton 



variegatus, Sturm. Wihtone, rare, in a 



stream 



cinereus, Aub6. Miswell, in the pond 



ruficollis, De G. Tring 



fluviatilis, Aub6. Wihtone 



lineatocollis, Marsh. Near Flaunden, 



rare 



Cnemidotus impressus, F. Hertford 

 (Stephens) 



DYTISCID.E 



NOTERINA 



Noterus clavicornis, De G. Hastoe 

 Laccophilus interruptus, Panz. 



obscurus, Panz. 

 HYDROPORINA 



Hyphydrus ovatus, L. Hastoe 

 Caelambus versicolor, Schall. 

 scarce, in the reservoir 



inaequalis, F. Tring 



parallelogrammus, Ahr. Wihtone, in 



the reservoir 

 Deronectes depressus, F. Wihtone 



1 2-pustulatus, F. Little Tring, in the 



canal 

 Hydroporus lepidus, Ol. Tring 



dorsalis, F. Wihtone, in the reservoir 



lineatus, F. Hastoe and Wigginton 



scalesianus, Steph. Boxmoor (Piffard). 



It is a great pleasure to be able to 

 record this species for the county, as 

 it seems so very restricted in its dis- 

 tribution 1 



angustatus, Sturm. Wigginton 



gyllenhali, Schiod. -\ 



palustris, L. V Tring 



erythrocephalus, L. ' 



memnonius, Nic. Ashridge Park and 



near Flaunden 



nigrita, F. Wigginton Common 



discretus, Fairm. Wihtone, in the 



reservoir 



pubescens, Gyll. Wigginton 



planus, F. Tring 



marginatus, Duft. Tring, one speci- 



men only of this rare insect taken in 

 1893 ; Hemel Hempstead (Pifhrd) 

 DYTISCINA 



Agabus guttatus, Payk. Wihtone, in the 

 reservoir 



1 Originally taken by Mr. Scales in Norfolk, 

 but the locality has been lost ; it appears to be 

 only found now in Askham Bog near York (Fowler, 

 British Coleoptera, vol. i.). 



DYTISCINA (continued) 



Agabus didymus, Ol. Wigginton and Little 

 Tring 



nebulosus, Forst, Little Tring, in the 



reservoir 



sturmii, Gyll. Wigginton 



chalconotus, Panz. Tring, in the 



reservoirs 



bipustulatus, L. Tring 

 Platambus maculatus, L. Wihtone, scarce, 



in a stream 

 Ilybius fuliginosus, F. Wigginton Common 



fenestratus, F. Wigginton Common 



ater, De G. Mhwell and Wigginton 



Common 



obscurus, Marsh. Wigginton Common 

 Rhantus bistriatus, Berg. Mis-well, in the 



pond 

 Colymbetes fuscus, L. Wihtone, in the 



reservoir 

 Dytiscus punctulatus, F. Near Totternboe 



(Piffard) 1 



marginalis, L. Hastoe 



Acilius sulcatus, L. Wigginton Common 

 and Wihtone 



GYRINID^E 



Gyrinus natator, Scop. Tring 

 HYDROPHILID^E 



Hydrobius fuscipes, L. Tring 

 Anacaena globulus, Payk. Little Tring and 

 Wihtone 



limbata, F. Wihtone 



Philhydrus testaceus, F. Wihtone, rare, in 

 the reservoir 



coarctatus, Gredl. Wigginton 

 Cymbiodyta ovalis, Thorns. Wihtone, 



scarce, in the reservoir 

 Helochares lividus, Forst. "| _. . 

 Laccobius sinuatus, Mots. / rm & 



bipunctatus, F. Wihtone 

 Limnebius truncatellus, Thorns. Tring 



papposus, Muls. Wigginton 



nitidus, Marsh. Tring, one specimen 



floating on a water butt in garden 

 HELOPHORINA 



Helophorus rugosus, Ol. Wihtone, not 

 uncommon in ditches 



nubilus, F. Tring. This insect may 



often be found in numbers at the 

 roots of grass, etc., on the hills 



aeneipennis, Thorns. > <_- . 



brevipalpis, Bedel. / * 

 Hydrochus angustatus, Germ. Wigginton 



Common ; Hertford (Stephens) 



1 Mr. Piffard has some doubts as to whether 

 this capture was really made within the county 

 boundary. 



88 



