48 THE CANADIAN ENTOMOLOGIST. 



closely related to A. fossor, but differs notably in its conspicuously 

 granulose head and pronotum, slightly wider head, less transverse pro- 

 thorax — ^/j as long as wide — (about ^ as long as wide m fossor) more 

 pronounced elytral markings and stouter front tibiae with broader apical 

 process. In fossor there are a few small granules on the head and pro- 

 notum, but these are discernible with difficulty, being nearly or quite con- 

 cealed by the vestiture in all specimens I have seen. 



I find it impossible from description to distinguish between Am- 

 modonus and the genus Scaptes as defined in the "Biologia." Scaptes 

 tropicus Kirsch, widely distributed over the central portions of the Amer- 

 ican continent and the adjacent islands, must be closely allied to the 

 present species, and perhaps still more closely io fossor. 



Supplementary Note on Microphotus. 



Since sending the MS. of the present article to the publisher, Mr. A. 

 B. Wolcott, of the Field Museum, of Chicago, has called my attention to 

 some remarks on Microphotus, including the description of a new species, 

 by Ernest Oliver, in the Revue Scientifique du Bourbonnais et du Centre 

 de la France— 19 II, No. 3, p. 79. The author calls attention to the 

 discrepancies in LeConte's writings as to the number of antennal joints, 

 which I have alluded to above, and says that in all ^ s seen by him— • 

 excepting the new species about to be described — the antennae are 

 9-jointed. This new species has lo-jointed antennas and is described as 

 follows : — 



"yl/. robustus, n. sp. — Pallide testaceus, elongatus, antennis decem- 

 articulatis ; prothorace supra caput rugose et profunde punctato, lateribus 

 leviter attenuatis, antice rotundato, basi vix sinuato, angulis rectis, 

 carinate, pallide testaceo, macule parva basali rubescente ; scutello 

 testaceo, triangulari ; elytris elongatis, subparallelis, fuscis, rugosis, obsolete 

 costulatis, prothorace baud latioribus, apicem versus attenuatis ; 9 

 ignota. Long. 12 mill. — San Diego. 



"Bien distinct des autres espèces par sa taille beaucoup plus grande, 

 ses antennes de 10 articles, son prothorax court, atte'nué, à sommet bien 

 arrondi, ses élytres acumine's, plus long que l'abdomen et un peu 

 déhiscents à partir de la moitié de leur longeur, etc." 



Where San Diego is we are not informed, but presumably in Cali- 

 fornia. The size is much greater than in any species of the genus known 

 .to me, being nearly double that of decarthrus, which alone agrees with 

 robustus in the number of antennal joints. 



