120 HYMENOPTEKA. 



size, eacli being neatly adapted to fill up the inside of the 

 swollen cuticle of its victim, they present more tangible 

 characters than many of the larger CyjiipidcB. The other 

 groups, so far as is known, are parasites of Diptera, and the 

 difficulty of discriminating them is not great, owing to the 

 variations of structure offered by their antennge, abdomen, 

 and wings. 



I have taken Psilodora maculata, Hart., upon cow-dung, 

 where it was probably in search of the larvte of Scatophaga. 

 It tallies exactly with the description of Mr. Newman's 

 Figites syrphi^ Ent. Mag. ii. 515, reared from Syrphus 

 rihesii, L. Two minute species with imperfect wings, allied 

 to Clidotoma, occur amongst decaying sea-weed on the 

 coasts, where Ccelopa and other littoral Diptera abound. 

 One of these is noticed by Mr. Walker, Ent. Mag. ii. 117, as 

 occurring at Torquay, and I found it at Milford Haven ; the 

 males I believe are able to fly, and frequent flowers, but 

 the specimens I formerly had are destroyed. The other is 

 described by Thomson, and I found it at Polperro in Corn- 

 wall. The singular little Glauraspidia^ their inland ana- 

 logue, is found rarely under rotten vegetable matter in woods. 

 The species of jEgilips are often to be seen on windows and 

 in gardens, being attached to Muscidce. Dicercea^ Forst., is 

 found gregariously, but not often, on nettles. An undescribed 

 species of Onychia^ Hal. (indicated as biusta in Westw. Int. 

 ii. Synops. p. 56), is British, and I believe I have one in bad 

 condition ; it belongs to Forster's Homalaspis. Cynips 

 ediogaster, Panz., is given as British (Curt., Guide, p. 126), 

 but it was not in Curtis's collection, and is nowhere reported 

 to my knowledge as taken in England. It is common near 

 Ajaccio, on umbelliferous flowers, and is also described as 

 Swedish, with some other fine species, which might probably 

 be discovered in this country, if there were any explorers. 



