26 GEO. H. HORN, M. D. 



received it from the Beavers captured at the mouth of the Rhone iu 

 France. Skins of Beavers from the Hudson's Bay region have 

 yiekled specimens while others from Ahiska have given both Phxtjp- 

 syUa and Leptinillus. Recently the Beavers of Texas have fur- 

 nished specimens. 



miscellaneous Coleopterous 5!itndies. 



BY GEORGE H. HORN, M. D. 



The following pages have not been used as the means of describing 

 isolated species merely, although several have been included. From 

 time to time the question is often asked as to the differences between 

 closely allied species, more especially of those genera that have not 

 been studied as a whole. As it is not always convenient to give in 

 detail in letters to each corres})ondent the information desii-ed, sev- 

 eral studies, based on questions asked, have been made and ai'c here 

 presented for the benefit of all. 



AlVILLTS Duval. 



A. explanatus n. sp. — Pale rufotestaceous, «liiiiing. Head rather larse, 

 frontal impressions deep and broad, surface smooth. Antennae nearly half as long 

 as the entire body, gradually thicker externally, the joiuls verticillate, the second 

 longer and stouter than the third. Thorax trapezoidal, a little wider than long, 

 sides arcuate anteriorly, oblique behind, the margin narrowly reflexed, hut more 

 broadly near the hind angles, these nearly rectangular, slightly obtuse, median 

 line finely impressed, the space behind the posterior transverse impression some- 

 what depressed and finely rugulose. Elytra abruptly wider at base than the 

 thorax, humeral angles prominent, but obtuse ; general form oval, broadest in 

 front of middle, the sides somewhat explanate from the humeri two thirds to 

 apex external to a deep stria bearing subocellate punctures, the margin distinctly 

 serrate near the humeri ; disc moderately convex, the striae nearly obsolete, 

 forming an oval space at the middle of the surface, the first stria indistinctly 

 punctured, the submarginal rather deep and with subocellate punctures ; surface 

 distinctly alutaceous near the base, smoother near the apex. Body beneath 

 smooth. Legs slender, middle tibi£e broadened at basal half. Length .08 inch ; 

 2 mm. PI. iii, fig. 25. 



One specimen, 9 , " Alabaster Cave," California. 



The species of Anillus now known to inhabit our fauna are as 

 follows : 



Elytra somewhat exi)lanate at the sides, the nuirgiu serrate near the humeri. 



e.\|>lanatus Horn. 



Elytra of regular ol)long oval form, the sides not explanate, margin not serrate. 



