198 [February 



LiBUBNiA Eeti, Fieb. 

 Fieber, Grundz. Delph., 11, 7, t. 8, fig. 31 ((J genitalia). 

 Crown nearly double as long as -wide ; elytra transparent, about two-thirds as 

 long as the abdomen, hind margin narrowly blackish ; legs pale, abnormally long, 

 knees (especially the hinder pairs) with a distinct black spot. <J , pronotum white, 

 with a black patch behind each eye, side keels not reaching the hind margin ; 

 scutellum black ; abdomen black, the base widely and the last segment yellow ; 

 pygofer yellow above, black beneath. $ , dirty brownish-yellow, with pitchy 

 markings on the abdomen, I'esembling in contour the same sex of L. notida, but a 

 little larger. 



I found this fine species amongst rusbes in a marsb at Weybourne, 

 Norfolk, in August last, in a situation wbich would not be readily 

 accessibJe in any but an abnormally dry season. 



131, Rupert Street, Norwich : 



December ^Ist, 1887. 



ACENTBOFUS NIVUUS IN NORFOLK. 

 BY C. G. BAEEETT, P.E.S. 



On A-Ugust 24tb I went over to Stalbam to meet my old friend 

 Mr. Wheeler, and to spend a few hours in our old haunts, the fens. 

 As we moved from the village w^e were delighted to see Papilio 

 Machaon (2nd brood) flying across from fen to fen. (1 hope that the 

 pleasure was reciprocal, for we could by no means follow^ or interfere 

 with them). "We looked longingly and proceeded. In crossing 

 Barton Broad we suddenly found that our boat was an object of 

 pursuit ; not that there was cause for alarm, our pursuers w^ere not 

 dangerous, being only very lively little males of Acentropus niveus, 

 which we had disturbed from their resting places on the floating 

 weeds, and which were consequently eager to find something solid 

 whereon to rest. 



Their movements were most curious, as they did not rise from the 

 surface of the water, but buzzed along it in a zigzag course, moving 

 their wings with great velocity, and really making very respectable 

 progress. On looking down we found that some had overtaken us, 

 and had climbed on to the rudder, where they remained quiet just clear 

 of the water, and were boxed without difiiculty, as w^ere the pursuers 

 as they came up. Of course our movements often caused them to be 

 immersed, but to this they appeared totally indifferent. We now 

 searched the floating weeds and rubbish, and found more males than 

 we cared to take, but with all our care were unable to meet with a 

 female. The bottom of this Broad is nearly covered with Stratiotes 

 aloides (water soldier), and we pulled up many plants and examined 



