^4 



adults starting burrows on 24th April in small, storm-broken limbs 

 and twigs of white pine, nearly always beginning near the axil of a 

 smaller branch. The male invariably started the burrow. One 

 burrow examined 9 days after its commencement was found to have 

 already three egg-galleries radiating from the nuptial chamber, with 

 eggs in the niches along each side. Adults of a second generation 

 emerged in the following month and were numerous in early July. 

 It is therefore evident that several generations may occur during a 

 single season, and it seems probable that two generations a year are 

 usual in central New York. This however depends largely upon 

 temperature and moisture conditions, in cool, shady situations only 

 1 or 1| generations being produced in a season. The brood burrows 

 are excavated almost entirely in the sap-wood, though the larvae at 

 j&rst feed chiefly on the bark. 



P. canadensis, Swaine, was taken in New York State on 20th June, 

 from white pine. This species both in appearance and type of injury 

 closely resembles P. cariniceps. P. granulatus, Swaine, is commonly 

 found in thin-barked white pine in central New York, especially in 

 small, suppressed trees. The burrows are unusually long and fine, and 

 can be distinguished by their being full of frass. It is probable that 

 one generation occurs in a year. Since the species almost always 

 attacks dying trees it can scarely be considered injurious. P. nudns, 

 Swaine, breeds in white spruce and is very similar in structure and 

 habits to P. granulatus, with which it is frequently associated. The 

 galleries, however, are shorter. P. puberulus, Lee, found in the 

 eastern portion of the United States and Canada, breeds in pine 

 and balsam fir. Small terminal twigs of diseased trees, or limbs 

 freshly broken from the trees, are attacked for preference. This 

 species eats out the imier bark and a good deal of the wood, sometimes 

 continuing the burrow into the pith. It is peculiar in that it makes 

 no effort to avoid any pitch it encounters, but on the contrary devours 

 it, apparently with rehsh. It also rarely attacks perfectly healthy 

 twigs and is therefore not nearly so injurious as it would otherwise be. 



Other beetles found in company of the above-named, chiefly in 

 suppressed or d}'ing trees, include Pilyogenes hopkinsi, Swaine, 

 Chrysobothris femorata, F., C. dentipes, Germ., Pogonocherus niixtus, 

 Hald., Leptostylus sexguttatus, Say, the Clerid, Phyllobaemis dislocatus, 

 Say, and, in the case of Pityophthorus granulatus, a predator, Hypo- 

 phloeus tenuis, Lee. Cocoons of a small Hymenopterous parasite have 

 been also found at the ends of the larval burrows of P. granulatus, 

 but have not been reared. 



Notes in connexion with Insect Pests. — Repf. Ayric. Dept., British 

 Virgin Islands 1918-1919, Barbados, 1919, pp. 7-8. [Received 

 27th November, 1919.] 



As certain cotton pests, and notably Eriophyes gossypii (leaf-blister 

 mite), are responsible for a great reduction in the cotton crop, serious 

 consideration has been given to the question of introducing legislation 

 to enforce a close time for cotton, that is, a period when no hviug 

 cotton plants would be allowed to exist. It was decided to postpouB 

 the introduction of legislation and attempt to attain this object by 

 voluntary co-operation, but probably recourse will have to be made 



