648 A CONTRIBUTION TOWARDS A KNOWLEDGE OF THE 



very deep and rather large anteriorly-overlapped cavity in the 

 middle of the hind margin of the last dorsal scutum, and the 

 very short backwardly directed antero-lateral setae of the 

 second dorsal scutum. The antennal joints sometimes reach 

 fifty in number, or, according to Latzel, fifty-five. 



Only one other species is placed with immaculata in 

 Group I., namely S. annata, Hansen, from Algeria. 



S. immaculata is apparently widely distributed and common 

 in Europe, being recorded from Norway, Sweden, Denmark, 

 British Isles, Germany, Austria, France, Italy, and Algeria ; 

 it is also known from North America. 



Comparatively recently Prof. Carpenter has recorded it from 

 various parts of Ireland, whilst Mr. Evans says that it is fairly 

 common and widely distributed in the Forth area, and in 

 addition records specimens from the Tay district. As the 

 species are so much alike it is quite possible that many of the 

 specimens found in our Islands are really referable to other 

 forms; I hope tlierefore to have the opportunity of examining 

 British specimens later. Prof. Carpenter has already kindly 

 submitted Irish material, of which every specimen is un- 

 doubtedly referrable to this species. In my old collection I 

 had specimens taken by Dr. Randell Jackson in Delamere 

 Forest, four or five examples from the Derwent Valley, Co. 

 Durham, and one from Wylam, Northumberland. 



This year I have taken two or three specimens in Axwell 

 Park near Blaydon (March, 1910), and several from woods on 

 the banks of the Wear at Leamside (May, 1910). 



Scutigerella caldaria, Hansen, 1903. (Plate xix,, fig. 2). 



Hansen, Quarterly Journal Microscopical Science, xlvii., 

 PP- 36-38, pl. 2, figs. 3a-3g, 1903. 



Belongs to Group II. of the genus, and is closely allied to 

 S. tingidculata, Hansen, being distinguished by good char- 

 acters pointed out by Hansen. The form of the hind margin 

 and the longer antero-lateral bristles of the second dorsal 

 scutum, as well as the absence of the cavity in the middle 



