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



p. 117; 1889, Fauna Transylvanica, Kafer, pp. 117, 548; Zoufal, 1894, Wien. 

 Ent. Ztg. 13 : 35, 42 ; Heyden, Reitter, and Weise, 1906, Cat. Coleopt. Europae, 

 p. 349 ; Reitter, 1911, Fauna Germanica, v. 3, p. 98 ; Jakobsen, 1913, Kafer Russ- 

 land, v. 2, pp. 952-953 ; Lesne, 1934, Soc. Ent. de France Bui. 39 : 174-175 ; 

 1935, Assoc. Nat. Loing, Bui. 18: 54, figs. 1-2 (publication not seen) ; 1935, 

 Paris Mus. d'Hist. Nat. Arch. (vol. du Tricent.) (ser. 6) 12: 427-433; 1938, 

 in Junk (pub.), Coleopt. Cat., pt. 161, p. 5. 

 Dictyalotus Redtenbacher, 1847, Fauna Austriaca, Kafer, p. 348. 



The foregoing bibliography given for the genus is not complete, 

 as only the most important articles are cited, especially those dealing 

 with the American species. 



Plead slightly convex, partially covered by the prothorax ; clypeus 

 strongly transverse, separated from front of head by a distinct trans- 

 verse depression; mentum transverse, triangular, deeply, broadly 

 omarginate in front; maxillary palpi 4-segmentecl, apical segments 

 oblong, acute at apices ; labial palpi 3-segmented, slightly shorter than 

 maxillary palpi, apical segments oblong, acute at apices; mandibles 

 robust, arcuate, biclentate on inner margins ; eyes round, slightly pro- 

 jecting. Antenna short, 11-segmented; first segment elongate, ex- 

 panded toward apex; second broadly oblong; third to fifth narrow, 

 slightly elongate; sixth to eighth round, the eighth sometimes trans- 

 verse; ninth to eleventh much broader, forming a distinct club, the 

 ninth subtriangular or subrounded, tenth transverse, and eleventh 

 round. Prothorax transverse, sides rounded and distinctly margined. 

 Scutellum small, quadrate. Elytra strongly convex, rounded pos- 

 teriorly. Legs short, subequal in length; tibiae slender or slightly 

 expanded toward apices, the anterior pair with a large arcuate spine 

 on inner margin at apices and a smaller spine on outer margins ; tarsi 

 5 -segmented ; last segment of each as long as the preceding four seg- 

 ments united. Anterior coxae prominent, contiguous. Middle coxae 

 narrowly separated. Body cylindrical. 



Genotype. — Of Endecatomus, Anobium reticulatum Herbst. 

 (Monobasic.) Of Dictyalotus, Anobium reticulatus Herbst. 

 (Monobasic.) 



Endecatomus is a small genus comprised at present of four described 

 species — reticulatus Herbst found in Europe, dorsalis Mellie found in 

 Texas and the central part of the United States, rugosus (Randall) 

 restricted to the eastern half of the United States and Canada, and 

 lanatus Lesne found in the Amour region of Asia. 



Mellie (1847) divided the genus Cis into six genera, creat- 

 ing Endecatomus for a species from central Europe which Herbst had 

 described in 1793 under the name of Anobium reticulatum.. During 

 the same year Redtenbacher (1847) erected the genus Dictyalotus for 

 Anobium reticulatus Herbst, placing it in the "Anobii". The following 

 year Mellie (1848) described the genus in great detail, figuring the 

 adult including various parts of the insect, with the following remarks : 

 "I erected the genus Endecatomus in 1847 for Anobium reticulatum 

 Herbst during March, and at the end of 1847, Redtenbacher erected 

 Dictyalotus for the same species, placing it in the Anobiidae after the 

 genera Anobium and Ochina." 



Schaum (1852) emended Endecatomus to E endecatomus (this may 

 have been emended in a previous edition, which is not available) and 

 placed it in the family Cioidae. The original spelling has been used 

 by the American workers and is preferred by the present writer, but 

 most European workers use the emended name. 



