28 ANNALS OF SCOTTISH NATURAL HISTORY 



SYN. 



1892. Hygrobates reticulatus^ Koenike. " Zoologischer Anzeiger," 



vol. xv. p. 268, No. 396. 

 1897-1900. Hygrobates reticulatus, Piersig. " Zoologica," Heft xxii. 



p. 197 (Deutschlands Hydrachniden). 



1899. Hygrobates reticulatus, Soar. "Science Gossip," vol. vi. p. 38. 



1901. Hygrobates reticulatus, Piersig. "Das Tierreich," Lief. xiii. 



p. 187. (Hydrachnidae u. Halacaridse Piersig u. Lohman.) 



The following record the name only : 



1900. Hygrobates reticulatus, Soar. "Journal of Quekett Micro. 



Club," Ser. 2, vol. vii. p. 392. 



1902. Hygrobates reticulatus, George. " Naturalist," p. 14. 



1904. Hygrobates reticulatus, Halbert. " Irish Naturalist," vol. xiii. 



No. 9, p. 201. 



1905. Hygrobates reticulatus, Soar. "Transactions of Norfolk and 



Norwich Naturalists' Soc.," vol. viii. p. 88. 



1906. Hygrobates reticulatus, Rousseau. " Memoires de la Societe" 



Entom. de Belgique," xii. p. 186. 



1907. Hygrobates reticulatus, Williamson. " Proc. Roy. Soc. Edin.," 



vol. xxvii. pt. iv. p. 304. 



1907. Hygrobates reticulatus, Walter. "Revue Suisse de Zoologie," 

 vol. xv. p. 527. 



1907. Hygrobates reticulatus, Maglio. " Rendiconti del R. 1st. 



Lomb. di Sc. e lett." Serie ii. vol. xl. p. 967. 



1908. Hygrobates reticulatus, Maglio. Ibid. vol. xli. p. 193. 



Before considering Dr. Johnston's description, it will be of 

 advantage to review the literature since Kramer's time, dealing with 

 the species hitherto known as Hygrobates reticulatus P. Kram. 



In 1879 Kramer described a new species under the name of 

 Nescea reticulata. The information he gives is confined to a 

 description of the reticulated skin and of the genital plates. With 

 regard to the latter, it is very evident from his description and from 

 the figure which he gives, that the specimen he had before him was 

 a nymph and not a male as he supposed. 



In 1 88 1 Haller described a new species which in some respects 

 resembled Hygrobates longipalpis. The principal points of difference 

 pointed out by Haller between H. longipalpis and the new species, 

 were the structure of the palpus and the hexagonally faceted body- 

 skin. 



In the same communication he also records Nescea reticulata 

 Kram. with which in his table of synonymy he associates Nescea 

 lutescens of Lebert. Reference to Lebert's memoir ("Bull. Soc. 

 Vaud. Sc. Nat." xvi., 1879), and to Koenike's revision ("Zeitschr. 

 f. Wiss. Zool." Bd. xxxv. p. 626), shows the association to depend 



