48 BULLETIN 1426, U. S. DEPARTMENT OF AGRICULTURE 
(32) Mueller, P. W. J. 
1807. AVIS SUR UNE ESPECE DE BOSTRICHE QUI DETRUIT LES RACINES DU 
trefle des pres. 64 p., illus. Mayence. [Not seen. Refer- 
ence in Hagen, H. A. Bibliotheca entomologica. Bd. 1. Leip- 
zig. 1862.] 
(33) N6RDLINGER, H. 
1869. DIE KLEINEN FEINDE DER LANDWIRTSCHAFT. Ed. 2. Stuttgart. 
[Not seen.] 
(34) Perris, E. 
1876. nouvelles promenades ENTOMOLOGiQUEs. Ann. Soc. Ent. France 
6: 171-244. 
(35) Pierce, W. D. 
1916. A NEW INTERPRETATION OF THE RELATIONSHIPS OF TEMPERATURE 
and humidity to insect development. Jour. Agr. Research 
5: 1183-1191, illus. 
(36) Reitter, E. 
1916. FAUNA GERMANICA. DIE KAFER DES DEUTSCHEN REICHES. Bd. 5, 
illus. Stuttgart. 
(37) Riley, C. V. 
1879. the clover-root borer. [U. S.] Commr. Agr. Ann. Rpt. 1878: 
248-250, illus. 
(38) Sanderson, E. D., and Peairs, L. M. 
1913. THE RELATION OF TEMPERATURE TO INSECT LIFE. N. H. Agr. 
Expt. Sta. Tech. Bui. 7, 125 p., illus. 
(39) Schmitt. 
1844. entwicklungsgeschichte des hylesinus trifolii muller. 
Stettin. Ent. Ztg. 5: 389-397. 
(40) Stapledon, R. G. 
1922. PRELIMINARY INVESTIGATIONS WITH HERBAGE PLANTS. V. SUM- 
MARY and general conclusions. Welsh Plant Breeding Sta., Abery- 
stwyth [Bui.] (H) 1: 91-94. 
(41) Swaine, J. M. 
1918. CANADIAN BARK-BEETLES. PART II. A PRELIMINARY CLASSIFICA- 
TION, WITH AN ACCOUNT OF THE HABITS AND MEANS OF CONTROL. 
Canada Dept. Agr. Ent. Branch Bui. 14, 143 p., illus. 
(42) United States Department of Agriculture, Weather Bureau. 
1925. summary of the climatological data for the united states, 
by sections. reprint of section 17. western oregon. 36 p. 
(43) Vassiliev, E. M. 
1913. [list of pests of lucerne. 1 Ent. Expt. Sta. AU-Russ. Soc. Sugar 
Refiners in Smiela, Govt. Kiev. (Reprint from Khoziaistvo, nos. 16- 
17.1913.) [Not seen. In Russian. Abstract in Rev. Appl. Ent. (A) 
1: 526-527. 1913.] 
(44) Wahl, C. von, and Muller, K. 
1914. BERICHT DER HAUPTSTELLE FUR PFLANZENSCHUTZ IN BADEN AN 
DER GROSSHERZOGL. LANDWIRTHSCHAFTL. VERSUCHSANSTALT AUGUS- 
TENBERG FUR DAS JAHR 1913. 70 p., illus. Stuttgart. 
(45) Webster, F. M. 
1896. SOME PARTICULARLY DESTRUCTIVE INSECTS OF OHIO. THE CLOVER 
root borer. Ohio Agr. Exp. Sta. Bui. 68: 31-33. 
(46) 
(47) 
(48) 
1899. the clover root-borer. Ohio Agr. Expt. Sta. Bui. 112: 143- 
149, illus. 
[1905.] the clover root-borer. U. S. Dept. Agr., Bur. Ent. Circ. 67, 
5 p., illus. 
1910. the clover root-borer. U. S. Dept. Agr., Bur. Ent. Circ. 119, 
5 p., illus. 
(49) Westgate, J. M., and Hillman, F. H. 
1911. red clover. U. S. Dept. Agr. Farmers' Bui. 455, 48 p., illus. 
(Reprinted, 1922.) 
(50) White, J. 
1888. the clover root-borer, hylastes trifolii, muller. Canad. 
Ent. 20: 138. 
o 
