346 Mr. A. Murray on the History 



Tribe 5. Stenorhynchina. Cutting-teeth conical ; grind- 

 ers more or less tliree-lobed, two front in each jaw single- 

 rooted, the rest two-rooted. Muffle hairy to the edge and 

 between the nostrils. Hind feet clawless. Antarctic 

 Seas and South Pacific ? 



StenorhynchuSj Grray, ihid. 15, f. 5. Lower jaw 

 strong, ramus erect ; grinders with three 

 cylindrical elongate lobes. 

 Orrimatophoca^ Grray, ihid. 33, f. 4. Lower jaw 

 slender in front ; grinders small, compressed, 

 with a central incurved lobe and a very small 

 one on each side. 

 LeptonyXj Grray, ihid. 11, f. 3. Lower jaw 

 weak, ramus shelving backwards ; grinders 

 subcompressed, with small central and smaller 

 posterior lobes. 



Tribe 6. Cystophoeina, Gray, iUd. 38. Lower cutting- 

 teeth conical, unequal ; grinders with small plaited crowns 

 and large swollen simple roots. Muffle hairy, of male 

 produced or inflated ; whiskers waved. 



Morunga^ Grray, ihid. 38, f. 13. Nose of male 

 produced into a trunk. Antarctic and North 

 Pacific Oceans. 

 Cystophora^ Grray, ihid. 40, f. 14. Nose of male 

 with an inflated crest. North and, perhaps, 

 South Atlantic. 



XLII. — On some points in the History and Relations of the 

 Wasp (Vespa vulgaris) and Rhipiphorus paradoxus. By 

 Andkew Murray, F.L.S. 



Every entomologist knows that Rhipiphorus paradoxus under- 

 goes its transformations in the nest of Vespa vulgaris (the 

 common wasp which makes its nest underground). But in 

 what capacity it is present there, and what are its relations to 

 its hosts, are still matters of dispute. Is it as a robber and a 

 murderer that it appears, or simply as a guest ? and if as a 

 guest, is it as a cuckoo-guest usurping the place of the genuine 

 offspring of its hosts, or as an inoffensive changeling innocently 

 imposed on the unconscious parents, and merely filling up a 

 place which (from the wasp point of view) might have been 

 better supplied had it been left empty ? 



In support of the more truculent hypothesis, Mr. Stone 

 records, in the * Entomologist's Monthly Magazine ' (i. p. 118), 

 how he found a larva of Rhipiphorus " sticking to the larva of 



