34 MISC. PUBLICATION 6 9 8, U. S. DEPT. OF AGRICULTURE 



at sides shorter than labrum ; labrum broadly rounded or subtruncate, 

 and ciliate in front; mentum transverse, broadly rounded in front; 

 maxillary palpi slightly longer than labial palpi, apical segment of 

 each long, subf usif orm, acute at apex ; apical segment of labial palpus 

 slightly shorter than maxillary; mandibles robust, acute at apices, 

 broadly toothed on inner margins near apices ; eyes slightly projecting, 

 transverse, oblong. Antenna short, 10-segmented ; first and second 

 segments robust, rounded, subequal in length ; third to seventh narrow, 

 very small, subequal in length; eighth to tenth segments forming a 

 large, loose club, the segments broad, eighth and ninth more or less 

 triangular, the tenth oblong. Pronotum subglobose, subequal in length 

 and width, rugose and tuberculate anteriorly, with flattened granules 

 on posterior part ; sides rounded, at most only slightly margined near 

 posterior angles. Scutellum small, quadrate. Elytra elongate, 

 strongly convex, stria-punctate, obliquely declivous posteriorly. Legs 

 short, subequal in length; tibiae slightly expanded toward apices, 

 dentate on exterior margins, anterior pair with an arcuate spine at 

 apices; posterior tarsi shorter than tibiae, apical segment as long as 

 preceding four segments united. Anterior coxae contiguous. Middle 

 coxae very narrowly separated. Body elongate, cylindrical. 

 Genotype. — Synodendron puMllum Fabricius. (Monobasic.) 

 Rhyzopertha is the original spelling for this genus with Synoden- 

 dron pusillum Fabricius as the monobasic genotype. Guerin-Mene- 

 ville (1845) andAgassiz (1846) emended Rhyzopertha to Rhizopertha, 

 the latter name being used by nearly all writers after that date, but 

 the present writer prefers to use the original spelling. 



Rhyzopertha dominica (Fabricius) 



Synodendron dominicum Fabricius, 1792, Entomologie Systematica, v. 1, pt. 2, 

 pp. 359-360. 



Synodendron pusillum Fabricius, 1798, Entomologie Systematica, Sup. p. 156. 



Sinodendron dominicum Fabricius, 1801, Systema Eleutheratorum, v. 2, p. 378. 



Sinodendron pusillum Fabricius, 1801, Systema Eleutheratorum, v. 2, p. 378. 



Rhyzopertha pusilla Stephens, 1830, Illus. Brit. Ent, Mandibulata, v. 3, p. 354; 

 Wollaston, 1854, Ins. Maderensia, pp. 287-288 ; Chevrolat, 1861, Soc. Ent. de 

 France Ann. (ser. 4). 1: 392. 



Rhizopertlw pusilla Bach, 1852, Kaferfauna fur Nord unci Mitteldeutschland, v. 2, 

 pt. 3, p. 118 ; Jacquelin-Duval, 1859-1863, Genera Coleopt. Europe, v. 3, p. 167, 

 pi. 57, fig. 281 ; Fowler, 1890, Coleopt. Brit. Is. 4 : 200-201, pi. 119, fig. 1. 



Rhizopertha dominica Lesne, 1896, Soc. Ent. de France Bui., p. 334 ; 1897, Soc. 

 Ent. de France Ann. 66 : 332-333, figs. 13, 21, 27b ; Fauval, 1904, Rev. d'Ent. 

 23 : 157 ; anonymous, 1908, .U. S. Dept. Agr. Yearbook, p. 579 ; Lefroy, 1909, 

 Indian Insect Life, p. 316 ; Reitter, 1911, Fauna Germanica, v. 3, p. 302, pi. 120, 

 fig. 10 ; Chittenden, 1911, U. S. Dept. Agr. Bur. Ent. Bui. 96, pt. 3, pp. 29-47, 

 figs. 7-8; Morrill, 1917, Ariz. Comm. Agr. and Hort. Rpt. 9, p. 59; Chittenden, 

 1919, U. S. Dept. Agr. Bui. 783, p. 9 ; Doane, 1919, Jour. Econ. Ent. 12 : 312 ; 

 Back and Cotton, 1922, U. S. Dept. Agr. Farmers' Bui. 1260, pp. 10-13, figs. 

 11-12 ; Froggatt, 1927, Forest Insects and Timber Borers, p. 98 ; Leonard, 1928, 

 N. Y. (Cornell) Agr. Expt. Sta. Mem. 101: 416; Hoffman, 1933, Jour. Econ. 

 Ent. 26 : 293-294; Gardner, 1933, Indian Forest Rec. Ent. Ser. 18 (9) : 6-7, pi. 3, 

 figs. 32-36 ; Schwardt, 1933, Kans. Ent. Soc. Jour. 6 : 61-66 ; Fleury, 1933, Calif. 

 Dept. Agr. Spec. Pub. 119 : 30 ; Stracener, 1934, Jour. Econ. Ent. 27 : 767-771 ; 

 Potter, 1935, Roy. Ent. Soc. London Trans. 83 (4) : 449-482, figs. 1-25; Beeson 

 and Bhatia, 1937, Indian Forest Rec. New Ser., Ent. 2 : 228, 282-284, 309-319 ; 

 Lesne, 1938, in Junk (pub.), Coleopt. Cat, pt. 161, pp. 18-19; Anderson, 1939, 

 Wash. Acad. Sci. Jour. 29: 388, fig. 5 (larvae) ; Crombie, 1941, Jour. Expt. Biol. 

 18 : 62-79, fig. 1 ; Balzer, 1942, U. S. Dept. Agr. Farmers' Bui. 1906, pp. 1-22, 

 figs. 1-15. 



Dinoderus pusillus Horn, 1878, Amer. Phil. Soc. Proc. 17 : 549, 550 ; Riley, 1882, 

 Amer. Nat. 16: 747; Gorham, 1883, Biol. Centr.-Amer., Coleopt, v. 3, pt. 2, 



