558 EXPERIMENT STATION RECORD. 



n. ser., 33 (1911), No. 851, p. 623).— The first part of this volume takes up the 

 Diptera that have aquatic lurvse. vi^ith the exception of the Chirononiidte, which 

 will be treated in the second part. Synoptic tables to the genera and species 

 and in many cases to the genera of the larvjie as far as known are included. 

 Jlany of the genera and a number of the species taken up occur in this country. 



The bean fly (Pegomya fusiceps), S. B. :McCready (Ann. Rpt. Ontario Agr. 

 Col. and Expt. Farm, 36 (1910), p. 43). — Brief notes are given on the occurrence 

 of this pest, together with suggestions for preventing attack. 



Injuries to forests and forest products by roundheaded borers, J. L. Webb 

 (U. S. Dcpt. Af/r. Ycarhool- 1910, pp. 3-',l-3.->8. pi. 1, fif/s. i/).— In this paper the 

 author treats briefly of 11 species of roundheaded borers. 



" The western larch bark-borer, Tetropiuin velutimim, attacks perfectly 

 healthy western larches, making winding, irregular galleries in the inner bark, 

 thus cutting off the flow of sap and killing the trees. The methods of control 

 are preventive. No attempt is made to save a tree which has once become 

 badly infested. After becoming infested, trees should be felled and barked and 

 the bark burned before the following INIay 15. A few healthy trees felled in 

 May or June, near those infested, should attract the beetles which would other- 

 wise deposit eggs in healthy trees. Before the following spring the bark should 

 be stripped from these trap trees and burned." 



The southern pine sawyer, Monahammus titiUator, which is very destructive 

 to felled pine timber in the Southern States has previously been considered 

 (E. S. R., p. 260). An account of the locust borer, Cyllene roMnia:, has also 

 previously been noted from another source (E. S. R., 18, p. 159). 



" The painted hickory borer, C. caryw, attacks dead and dying hickory, wal- 

 nut, honey locust, mulberry, and Osage orange, the larval mines often riddling 

 the sapwood and sometimes the heartwood as well. To prevent the spread of 

 this species, all cutting of green timber should be done between August 10 and 

 Kovember 1. Timber which must be cut in spring or early summer should have 

 the bark removed and the tops and useless branches burned. 



" The black-horned pine-borer, CalUdium antennatum, is an enemy of dead or 

 dying cedar, juniper, pine, and spruce. Rustic work is especially liable to in- 

 jury from this source. As a preventive against injuries by this species, cedar, 

 juniper, pine, and spruce should be cut in late summer, fall, or early winter. 

 If cut between January and August the trees should be barked when felled. In 

 the case of injuries to rustic work, an injection of bisnlphid of carbon and the 

 plugging up of the holes with wax or putty is recommended. 



" The cedar-tree borer, Hylotrupes ligneus, attacks dead and injured Douglas 

 fir, arbor vitse, red cedar, redwood, western hemlock, Engelmann spruce, juniper, 

 alpine fir, giant arbor vitse, white fir, big tree, and Arizona cypress. Like the 

 black-horned pine-borer, it is injurious to rustic work. The usual preventive 

 measures are recommended, i. e., removing the bark from trees when felled, or 

 treating rustic work as recommended for the black-horned pine-borer." 



The western cedar bark-borer, H. amcthystimis, which has been found only in 

 the Pacific Coast States, is of considerable economic importance in injuring the 

 bark and wood of recently felled giant arbor vitse and incense cedar. There 

 is thought to be but one generation of this beetle per year and that adults 

 emerge and deposit eggs in July, August, and September. The same recom- 

 mendations for preventing injury as those given for the cedar-tree borer are 

 applicable to this species. 



The banded ash borer. Needy tus caprcea, is apparently the most destructive 

 borer affecting ash, the larvjie perforating the sapwood with their mines and 

 greatly depreciating its value, if not entirely ruining it. Besides ash, the borer 

 attacks and lives in mesquite and, rarely, in white oak. The removal of the 



