18 COLEOFTERA. 



above mentioned. Dr. Sharp notes that the broad turned- 

 under margin of the base of the elytra is of a rather obscure 

 red in unguicularisy and quite black in affinis, which insect is 

 altogether of a darker and blacker colour; and he also gives 

 instances proving Schaum's opinion, that Thomson's genera 

 cannot stand, to be correct. 



Schaum's affinis appears to be unguicularh, 



10. Agabus Solieri, Aube, Hydroc. et Gyr.,359; Schaum, 



1. c, 98; D. Sharp, Ent. M. Mag., vol. iv, p. 232. 

 sexualisj Reiche; Crotch, Cat. Brit. Col. Ed. 2. 



Dr. Sharp notes the above corrections in the name of one 

 of the Reichean Scotch enigmas (of the descriptions of the 

 others of which, in E. M. M., loc. cit.,I have given a trans- 

 lation); and also records the capture of a female specimen 

 of the insect itself high up on Mamsoul, Inverness-shire. 

 Tt appears to differ from A. bipui^tulatus in its smaller 

 thorax, the sides of which are rounded and the base straight, 

 with obtuse posterior angles. The whole insect seems also 

 to be narrower, flatter, more finely striated and duller ; and 

 the anterior claws in the male are somewhat differently con- 

 structed. 



Dr. Mac Nab subsequently (E. M. M., iv, p. 283) re- 

 cords the capture by himself of a female specimen near 

 Dumfries, at an elevation of 1800 feet, in company with A. 

 biptistulatus, and of another female near Loch Brandy, 

 Clova. 



11. Hydroporus glabellus, Thomson, Skand. Col., ix, 



pp. 80, 296; G. R. Crotch, 1. c, p. 66, 

 Mr. Crotch records this species as not rare in England, 

 and adverts to the still existing confusion amongst its allies. 



