168 



farinosus; the Longicorn, Lagochirus araneiformis ; Xyleborus perforans 

 (shot-hole borer) ; and the Coccids, Pseudococcus sacchari, P. calceolariae 

 and Targionia sacchari. 



A brief account of the remedial measures advocated is given. 



Wade (J. S.) & Myers (P. R.). U.S. Bur. Ent. Observations relative 

 to recent Recoveries of Pleurotropis epigonus, Walker. (Hym.). — 



Proc. Ent. Soc, Washington, D.C., xxiii, no. 9, December 1921, 

 pp. 202-206. 



The occurrence of Pleurotropis epigonus, Wlk., a parasite of Mayetiola 

 (Phytophaga) destructor. Say, in America since its introduction from 

 England is reviewed [cf. R.A.E, A, iv, 195]. It has now become 

 established and occurs throughout Maryland, Pennsylvania, New 

 Jersey and New York. A list is given of all known records of 

 distribution. 



Craighead (F. C ) & Loughborough (W. K.). Temperatures fatal 

 to Larvae of the Red-headed Ash Borer as applicable to Commercial 

 Kihi Drying.— J/. Forestry, xix, no. 3, 1921, pp. 250-254. 

 (Abstract in Expt. Sta. Record, Washington, D.C., xlv, no. 7, 

 November 1921, p. 662.) 



The conclusion is arrived at that the larvae of the red-headed ash 

 borer [Neoclytus erythrocephalus, F.) are killed in any kiln process 

 which can be considered practical for the seasoning of ash, regardless 

 of the thickness of the timber. Even temperatures as low as 105 

 to 135° F. are fatal to them. Subjecting infested material to a 

 temperature of 116° for 45 hours resulted in the death of all the 

 larvae. Temperatures of about 125 to 130° will kill the larvae 

 within an hour after the wood becomes heated throughout. Dry heat 

 is fatal to the larvae at a lower temperature than hot water for the 

 same period. 



In dry air experiments several larvae of Xylotrechus colonus, F., 

 from hickory were used, and the effects were similar to those produced 

 on A^. erythrocephalus. Although it is hardly likely that the same 

 temperatures will be equally fatal to other insects, such as those 

 native to the Southern States, it is probably safe to assume that if 

 commercial kiln schedules at temperatures higher than those given 

 are used on other woods, other species of borers that may be in the 

 timber will be killed. 



Clute (W. N.). Cure for Iris Borer. — Flower Grower, viii, no. 2, 1921, 

 p. 33. (Abstract in Expt. Sta. Record, Washington, D.C., xlv, 

 no. 8, December 1921, p. 759.) 



The iris borer, Macronoctua onusta, which is found in most species 

 of Iris and closely related plants, lays its eggs in autumn on the old 

 leaves. The caterpillar hatches out in the spring, bores down through 

 the sheaf of leaves, and soon establishes itself in the root-stock, where 

 it is almost impossible to reach it. The best remedy is said to consist 

 in burning over the iris beds in early spring before it has gained access 

 to the root-stock. Burning a thin cover of dead weeds raked over 

 the plants, when the wind is right, is said to be sufficient to destroy 

 the borer. 



