1C6 GEORGE n. HORN, M. D. 



Four genera are recognised in the Classification of Coleoptera of 

 North America hy Dr. Leconte, two liaving four dilated joints to the 

 male anterior tarsus, while two have but three. 



Four joints of anterior tarsus % dilated. 



All the tarsi pubeseent lieneath Lachnocrepis. 



Posterior tarsi not pubescent beneath Anatrichis. 



Three joints of anteriol- tarsus'^ dilated. 

 Posterior tarsi not pubescent beneath. 



Antennae slender, filiform Oodes. 



Autennse stout, compressed Evolenes. 



LACHNOCEEPIS, Lee. 

 L. parallsla, Say {Oodes?) Trans. Am. Phil. See. iv, 420. Lee. Trans. Am. 

 Phil. See. X, 391. 



This species is elongate, parallel, and very feebly convex. The 

 sides of the thorax are distinctly rounded in at the base, so that a dis- 

 tinct angle is formed between the sides of thorax and elytra. The ely- 

 tra are finely seven-striate, the strias distantly punctulate, intervals 

 flat, and when seen under high power, finely alutaceous, the third 

 having near the apex a single small puncture. Color entirely black, 

 with no metallic lustre. Length .42 inch; 10.5 mm. 



Occurs over a wide region; Pennsylvania, Georgia and Missouri, 

 but is by no means abundant. 



ANATRICHIS, Lee. 

 A. minuta, Dej. (OocZcs) Species v, 077 ; Lee. Trans. Am. Phil. Soc. x, 391. 

 Form oval, broader behind. Thorax with distinct median and 

 short longitudinal basal impressions. Elytra rather deeply striate, 

 striae serrately punctured, intei'vals flat. The entire surface of the 

 body is rather densely punctulate. The middle tibia3 of the male 

 have below the middle an oblique emargination. Color black, shining. 

 Length .20 — .24 inch ; 5 — 6 mm. 



Occurs in Louisiana, Texas, and Missouri. 



OODES, Bon. 

 Our species, although more numerous than those of all the other 

 genera taken together, are at present but eight in number, and have 

 been divided into three genera by Chaudoir, (Bull. Mosc. 1857, iii, 

 pp. 20 — 21), which may here serve as a basis for their illustration in 

 tabular form. 



Ligula free at apex. 

 First joint of anterior tarsus 'J, entirely spongy beneath; elytra with seven 



striae equally distinct (OODES, Chaud.) 



Thora.K gradually broader from base to apex amaroides. 



Thorax slightly narrowed at base ... j amlricanus. 



