Horn.] -ob [June 20. 



H. ecBnosus, Er. Jaliib., 1834, p. 154 ; Mars. Mon., 1854, p. 276, pi. 8, 

 fig, 76; decisus, Lee. Bost. Journ. V., p. 51, pi. 2, fig. 10; repletus, Lee. 

 loc. cit. p. 49, pi. 3, fig. 6. 



Thorax bistriate, inner stria entire, outer abbreviated but extending 

 beyond the middle, and between the two stria at apex are either a few 

 puuctui-es or a very short stria. Front not impressed. Elytra with four 

 entire strise, a fifth extending to middle and the sutural longer, sub- 

 humeral at apex deeply imjjressed, and with a very short feebly im- 

 pressed humeral appendix. Epipleurae bistriate. Propygidium very 

 sparselj'' punctured, pygidium very minutely piuietulate, and with a few 

 coarser punctures near the sides. Anterior tibiae with the outer margin 

 regularly arcuate, minutely denticulate. Hind tibijB biseriately spinu- 

 lose. Length .18-. 22 inch ; 4.5-5.5 mm. 



I cannot find that repletus differs except in having the fifth dorsal stria 

 a trifle longt'r. 



Occurs from the Gulf States to Mexico. 



H. punetifer, Payk. Mon. p. 25, pi. 4, fig. 1, Lee. Bost. Journ. Y.. 

 p. 51, pi. 2, fig. 9 ; Mars. Mon., 1854, p. 265, pi. 8. fig. 67. 



The surface sculpture of this species is precisely that of canosus, and 

 differs as follows : Head with a shallow fovea. Outer thoracic stria not 

 extending to middle. Humeral appendicular stria short deeply im- 

 pressed. Propygidium on each side with a shallow imj)ression. Anterior 

 tibiiB feebly quadridentate. Length .22 inch ; 5.5 mm. 



One specimen said to have been found in tLe Middle States, corres- 

 ponding exactly with Marseul's description, is before me. 



H. thoracieus, Payk. Mon. p. 20, pL 2, fig. 5. 



From the description this species appears to be allied to the preceding. 

 It is, however, entirely unknown, either to us or Marseul. 



H. abbreviatus, Fab. Syst. Ent. p. 53 ; Lee. Bost. Journ. V., p. 52, 

 pi. 2, fig. 11 ; Mars. INIon., 1854, p. 283, pi. 8, fig. 82 ; subfiemisjyhencus, 

 Beauv. Ins. p. 180, pi. 6, fig. 7 ; bifidus, Say, Journ. Acad. 1825, p. 34 ; 

 Lee. loc. cit. pi. 2, fig. 12 ; Mars. loc. cit. p. 284, pi. 8, fig. 83. 



Thorax at sides bistriate, outer stria extending to middle, inner entire. 

 Elytra with four entire strife coarsely punctured, fifth .short, apical, 

 sutural half the length of the elytra. Subhumeral at apex deeply 

 impressed, with humeral appendix extending to base, also deeply im- 

 pressed, and joining the apical jjortion behind its lip. Propygidium 

 coarsely and sjiarscly punctured, pygidiiun nearlj^ impunctate. Anterior 

 tibia) feebly 4-dentate apical tooth bifid. Length .12-. 20 inch ; 3-5 mm. 



This species varies somewhat in the length of the outer thoracic striaj, 

 as well as in the depth of the elytral striae. . One specimen before me 

 has a mere trace of an external subhumeral near the apex. 



Middle States to Georgia, and westward to Montana and Kansas, 



H. civilis, Lee. Bost. Journ. V., p. 55, pi. 3, fig. 5 ; Mars. Mon., 1854, 

 p. 570, pL 9. fig, 134. 



