290 GEO. H. HORN, M. D. 



Male. — Anterior and middle tarsi slightly dilated. Posterior femora slender 

 and simple, the posterior tibise long, slender, and regularly arcuate from base 

 to apex and not thickened at tip. 



Female. — Tarsi slender, tibise straight. 



This species closely resembles collaris but the thorax is here 

 broadest at base. It is the only species in which I have observed 

 the irregularity of the striae above mentioned and this seems to have 

 suggested the name. The specimen described by Mannerheim was 

 evidently a female. With it I have united morula Lee. 



Two specimens, California and Washington Territory. 



A. conTerta Lee. — Oblong-oval, piceous, elytra paler, moderately shining. 

 Head rather coarsely but sparsely punctate. Tliorax a little more than twice 

 as wide as long, narrowed in front, apex emarginate, base truncate, sides 

 feebly arcuate, hind angles distinct but very obtuse, surface sparsely punc- 

 tate, punctures a little coarser at the sides. Elytra a little wider than the 

 thorax, base at humeri slightly oblique, sides moderately arcuate, sutural 

 stria moderately deep posteriorly, surface with rows of rather coarse punc- 

 tures, those of the strise and intervals equal, color castaneous, suture and 

 margin darker. Metasternum and abdomen obsoletely punctate and alutaceous. 

 Length .10 inch; 2.5 mm. 



Male. — Anterior tarsus of male dilated, middle tarsns even broader, posterior 

 femur with outer condyle unciform, the tibia slightly arcuate and a little 

 broadened at tip. (PI. VII, fig. 4 a). 



From its general appearance this species could only be mistaken 

 for paludicola, but the regularity of the elytral punctuation and the 

 sexual characters of the male at once distinguish it. 



One % , Illinois, cabinet of Dr. Leconte. 



A. palndicola Crotch. — Oblong-oval, piceous to castaneous, moderately 

 shining. Head sparsely puncrate. Thorax a little more than twice as wide 

 as long, narrowed in front, apex emarginate, sides and base arcuate, hind 

 angles distinct but obtuse, surface sparsely punctate. Elytra as wide at base 

 as the thorax, slightly wider at the middle, sides moderately arcuate, base 

 slightly oblique on each side, humeri rounded, surface rather coarsely and 

 irregularly punctate with traces of a striate arrangement at the sides, sutural 

 stria moderately deeply impressed, feeble at base. Metasternum punctate and 

 alutaceous, abdomen alutaceous. Length .10 inch; 2.5 mm. 



Male — Anterior and middle tarsi feebly dilated, posterior tibiae slightly 

 arcuate. 



Female. — Tarsi simple, tibise straight. 



This species resembles certain of our small Hydnobius more than 

 it does the typical Anisotoma. Among the species of the latter it 

 most closely approaches conferta but here the punctures are in 

 distinct striae. 



Collected at El Cajon near San Piego, California, by Mr. Crotch. 

 It also occurs further north iu California. 



