850 Insects. 



cies of Pteromalus. The latter part of these notes were extracted from Forster's 

 Monograph of the Chalcidites. — Francis Walker ; Grove Cottage, Southgate. 



Parasitism of Pteromalus domesticus. In addition to Lozotaenia Xylosteana, which 

 I have observed to be infested by this insect, I believe that it destroys the species of 

 Anobium, for I have frequently seen it on decayed wood, and also on a floor perforated 

 by that beetle. This fly, like Cyrtogaster vulgaris and Pteromalus tenuis, lives through- 

 out the year, being torpid during the cold weather, though the occurrence of a mild 

 day often draws it from its retreats. — Id. 



Parasites of Microgaster glomeratus, Linn. This insect, ordained to limit the 

 increase of the common large white cabbage butterfly (Pontia Brassica), is, in its turn, 

 kept within due bounds, by being subject to the attacks of two minute parasites, 

 Tetrastichus Rapo, and a small species of the Ichneumonidae Genuini. From some 

 cocoons that I had collected, many specimens of the Microgaster emerged during the 

 first week of October, and about one month afterwards, a few of the Ichneumons 

 above-mentioned made their appearance. The caterpillar of the same butterfly is 

 also infested by three species of Pteromalus, P. puparum, P. omnivorus, and P. 

 cams. — Id. 



Occurrence of Curculionidce in Devon and Cornwall. From upwards of one thou- 

 sand specimens of Curculionidae, the result of five months' diligent research in Devon 

 and Cornwall, during the past summer, I select the following as most worthy of notice. 

 Some of them, it will probably be observed, are common in other localities ; but such 

 are merely admitted on account of their having appeared in greater abundance than 

 usual, and in order that the subjoined list may give a more perfect idea of the Cur- 

 culionites indigenous to the West of England. 



Cossonus Tardii. In great profusion along the south coast of Cornwall, especially 

 near Fowey and St. Anstle : also at Mount Edgcumbe, in Devonshire. (Zool. 702). 



Gymnaetron Veronicas (Germ.) Treglith, near Launceston, a single specimen. 



Sphaerula Lythri. Exceedingly abundant throughout the whole of the two 

 counties, more particularly on the south coast, where it occurs by tens of thousands. 



Orobitis Cyanea. At Mount Edgcumbe, but rare. 



Caeliodes subrufus (Gyll.) Abundant on oaks throughout Devonshire. 



Ceutorhynchus Quercus, guttula, rubicundus, and ruber. Also abundant. 



Nedyus contractus, Cochleariae, haemorrhoidalis (at Whitsand Bay, but rare), 

 floralis, impressicollis of Little. (This was first discovered by the Rev. W. Little, in 

 Scotland ; my own specimen, which I captured on the banks of the Tamar, being, 

 as far as I can ascertain, the only instance of its having occurred in this country). 

 Ericae, ovalis, pollinarius, viduatus, melauostictus, and marginatus. 



Rhinonchus tibialis and bruchoides. Both tolerably abundant, especially the 

 latter, which appears to inhabit the common Polygonum Hydropiper. 



Pachyrhinus Comari. Not common, but distributed, nevertheless, throughout the 

 two counties. 



Pachyrhinus Waltoni (Schbn.) Also in abundance on Polygonum Hydropiper. 

 It corresponds to Pach. velaris (Gyll.) of British cabinets, which insect, I understand, 

 so far as has yet been discovered, does not inhabit England. The present species has 

 been called "velaris" by mistake, it is properly the " Waltoni" of Schonherr. 



Hydronomus Alismatis. Banks of the Tamar, in June. 



Hypera dissimilis. Very abundant, in June, under the stones of the famous pebble- 

 ridge at Northam Burrows, near Bideford, in company with Otiorhynchus ligneus and 



