ON SOME INVERTEBRATES FROM ST. KILDA 151 



specimens taken were in the cysticercus stage with invaginated 

 heads, but one had apparently assumed the adult condition. Mr. 

 A. E. Shipley, M.A., F.R.S., to whom all have been submitted, 

 remarks that the form is peculiar " as the head evaginates and the 

 body segments whilst still in the larval form." This interesting 

 worm is digenetic, its earlier stages being passed in the mouse and 

 the later in the cat. In the village itself I can remember only 

 one cat at the manse, a fact explained by the ubiquity of a useless 

 breed of dogs. There are, however, a number of cats run wild on 

 the cliffs where probably M. hirtensis forms some part of their diet. 

 A full account of the literature, anatomy, and life-cycle will be 

 found in a memoir by E. Bartels in " Zool. Jahrb.," 1902, pp. 511- 

 570, plates 37-39- 



INSECTA. 

 HYMENOPTERA ICHNEUMONID/E. I 



A month's collecting yielded only 17 specimens, comprising 

 9 species. These have been kindly named for me by Mr. Claude 

 Morley, F.E.S. A Proctotrypid, a Pezomachus, 1 and the abundant 

 My r mica rubra, L., 1 complete the Hymenoptera taken, and the 

 list, in view of the fine weather enjoyed, cannot but be considered 

 small. I was particularly anxious to test the statement that neither 

 bees nor wasps occur on the island, but found that though many 

 of the inhabitants knew what a bee was, their information came from 

 books ! 



Alomyia defoliator, Fab. 2 o* <?, common in hot sunshine on grassy 

 ledges, N.E. face, Oisaval. It has a sluggish, low flight. 

 Its occurrence in July is interesting as it has hitherto been 

 taken in May and again in September ( " Brit. Ichneumons," 

 p. 291). 



Hemiteles tristator, Grav. $ and $ . 



Hemiteles ? oxyphimus, Grav. $ . 



The following four species taken by me in the island have up 

 to the present been known in Britain chiefly from S. England (vide 

 Mr. Morley's paper "Trans. Ent. Soc." 1905, pp. 419-438). 



Bassus varicoxa, Thorns. "Common in Suffolk, Cambs, etc." 



Bassus (Zootrephus) rufiventris, Grav. 5 $ $ and i $ . " Not 

 rare, Suffolk, Lowestoft," etc. 



Bassus (Promethus) dorsalis, Holmgr. <J? . " Not common, Suffolk, 



Surrey." 

 Bassus (Homoporus) graculus, Grav. $, . " Not uncommon, 



Suffolk, Herts," etc. 



1 Reported on by Mr. Evans, " A.S.N.H." April 1906. 



