81 



wbich bas become wrinkled owing to its being preserved in datn- 

 marbalsam by Dr. A. R. Spoof. 



It is a fact wovtb noting tbat tbis nympb is caught alive in 

 subsaline water in tbe spawn of Limnaea stagnalis. 



31. Notaspis alatus Herm. 



An individual sent to me by Dr. A. R. Spoof, from °Abo, is 

 a real alatus Herm., witb sbort and clavate pseudostigmatic organs. 

 They are already discernable as sucb tbrougb a common pocket mag- 

 nifying glass. 



I also received a specimen caugbt at Apeldoorn (summer-Resi- 

 dence of our Queen), witb sbort and clavate pseudostigmatic organs. 



32. Trichotarsus koptorthosomae Oudiiis., nov. sp. 



(With Plate III, fig. 53 and 54) 

 Hypopus. Length about 200 — 240 pc. Tbe creature is related to 

 Trichotarsus xylocopae Dormad. Dorsal side (Fig. 53). Tbe anterior 

 crescent-sbaped portion sbows about ten wrinkles and 4 pair of 

 strong bristles. Tbese are stronger tban tbose of T. xylocopae. Tbe 

 posterior round or oval portion is protected by a sbield whicb 

 is very finely punctured, witbout sbowing tbe known marking of 

 Trichotarsus osmiae (Duf.), etc. The dorsuni, bowever, sbows a 

 cbaracteristic cbitinization. In tbe posterior balf of tbe sbield 

 tbere is a figure like a pair of sugar-tongs. Between the tongs 

 the dorsum is concave, as it is before and on either side of 

 the tongs. The posterior margin of the abdomen is strongly chi- 

 tinized and brown coloured. In connexion witb these strong chi- 

 tinizations the posterior edge of the abdomen bas a median pro- 

 jection and a concavity on either side of it. The projection bears 

 two little hairs. 



Ventral side. The epimera 1 meet in the median line, forming 

 an Y. Those of the 3d leg are bent rectangularly. The sucker- 

 plate is small, does not extend beyond the posterior edge of the 

 abdomen, and bears 8 suckers, of which the foremost pair are small, 

 situated one on each side of the anus ; two large ones are placed more 



