SCIENCE- GOSS/J'. 



303 



Kil.MKKA. Arraiiui'ii in one uroup. 



rAM'l. — Alioiit 0.20 mm. lony, rallicr short ;iii(l 

 thick. There i.s a small pej; .it the last joint sHijhtly 

 overlapping the fifth segment and placed on the 

 inner edge. 



32^^^ 



Kiel. a. P. Uuckartt, Tnrsus of third foot. 



C.KMIAI. Arka. - lias three discs on each side of 

 the genital cleft (tig. i). 



Kkmai.K. — Rather larger than male. The llpi- 

 mera are arranged in four grotips. Legs without 

 the modifications we lind in the male. 



^^CEi: 



Fig. 



/'. Uiicktlrti. Fourth leg. 



LacAl.nilcs. — Found by Dr. George in Lincoln- 

 shire, and by Mr. Scourtield in the LaUe District. 



2. /'ianaceniis iDici/iafas Koenike, 1885. 



I have only seen one male of this species. It was 

 sent to me by Mr. Scourfield in 1895. He found it 

 at Llyn-y-Gades, Cader Idris, North Wales. It was 

 in rather bad condition, so much so that I was only 

 able to make a few notes and take an outline draw- 



itncinaiits. Foiirlh leg. 



ing of the fourth leg and palpi. In the curve of the 

 tarsi there are only four teeth, instead of seven, and 

 the palpi are without the small peg I mentioned in 

 P. Uuckarti on the last joint. In colour it was a 

 deep orange-yellow. I hope some other collector 

 will again find this species. 



3. Pioiiacerciis -z'alra.v Koch, 1835. 



Male. — -Oval in form. Length about 0.44 mm. ; 

 breadth about 0.36 mm. Pale yellow in colour, with 

 brown markings. 



Legs. — First pair about 0.56 mm. : fourth pair 



0.4S mm. Tarsi of the first two pairs rather large 

 and prominent ; tarsi of third pair modified similar 

 to fig. 2. Fourth pair of legs show a very great 

 difference to the others noticed (figs. 3 and 4), 

 in having a long spur projected from the fourth seg- 



Fig 5. P, ralra.i. Fourth leg. 



ment (fig. 5 at a). This spur is very plainly shown in 

 Koch's figure. 



Ki'lMERA. — Not (|uite formed in one group, as 

 fig. I, each pair being lined out distinctly, although 

 clo.se together. ( itherwise the general form is about 

 the same. 



I'ai.I'I. — Long and thin, fig. 6 being about 0.40 

 mm., nearly the length of the body. Koch's little 

 figure also shows the long palpi. They have the 



Fig. 6. P. t'atrax. Palpus. 



small peg mentioned in /'. /I'lifkarti, near the fifth 

 segment (fig. 6 at a). 



Genital Area. — Very similar to that shown on 



fig. I. 



Localities. — Found on the Norfolk Broads, 

 April 1S99. 



I'iersig, in his w^ork on German Hydrachna, 

 plate XXV'IL, fig. 70, has figured in outline this 

 mite of Koch's ; but I cannot find it mentioned in 

 the letterpress. On the fly-leaf of the plate it is 

 named Atcrcus vatrax. Koch named his mite 

 Tipliys vatrax ; but if my mite and Koch's are the 

 same — and I have every reason to believe they are by 

 the spur on the hind leg and the length of palpi — its 

 proper genus must be Pionacerciis. 



( To be continued. ) 



London University Election. — In the last 

 number of SciENCE-Gossii' we referred (p. 281) to 

 the need of a third candidate for the parliamentary 

 representation of the London University, caused by 

 the elevation of Sir John Lubbock to the Peerage. 

 Such candidate came in th.e person of Sir Michael 

 F'oster, K.C.B., F.R.S.. D.C.L., D.Sc, &c. It is 

 most satisfactory to find that the electors returned 

 .Sir Michael, the numbers on declaration of the poll 

 being: Sir M. Foster, 1,271; Dr. Collins, 863; 

 Mr. "Busk, 586. The high reputation of the new 

 member as a physiologist, and man of science gene- 

 rally, reflects the'greatest credit on the choice of those 

 electors who supported their new member. 



