162 DESCRIPTIONS OF NEW SPECIES. 



are shorter and less fine than in P. unguicularis, and the pubes- 

 cence of the under surface is also less fine. 



L.YTTA FABK. 



468. Li. pilberula. Nigro-picea senescens, pube pallida erecta ves- 

 tita, capite thoraceque sat dense punctatis, hoc spatiis parvis laevibus 

 transversim positis, latitudine paulo breviore lateribus rotundatis ; 

 elytris thoraee fere duplo latioribus, confertissime punctatis, fere opacis ; 

 antennis capite thoraceque baud longioribus, articulis externis globosis, 

 ultimo longiore ovato, apice acuto ; unguiculis testaceis. Long. '48. 



One specimen collected at Fort Whipple, Arizona, by Dr. 

 Elliott Coues, U. S. A. A rather stout species, readily distin- 

 guished by the characters given above : it belongs to the same 

 group as L. biguttata, and, as in that species, the outer spur of 

 the hind tibiae is very thick, obliquely truncate and concave at 

 tip, while the inner one is slender and acute. 



469. Li. viridana. Lsete viridisenea, capite thoraceqne pernitidis, 

 illo parce punctato, puncto verticali rubro, hoc punctis pancis impressis, 

 subpentagono, lateribus ante medium obtuse angulatis, disco bifoveato, 

 canaliculate, antice posticeque transversim impresso, margine basali 

 latins reflexo ; elytris thoraee plus sesqui latioribus, elongatis parallelis, 

 dense rugosis ; subtus cyanea ; trochanteribus posticis muticis, antennis 

 nigris moniliatis, articulo ultimo ovali acuto. Long. '60 '72. 



Mas segmento ventrali penultimo late emarginato, medio versus apicem 

 subtiliter carinato, ultimo fere ad basin fisso, fissura setis longis fim- 

 briata ; antenuis capite thoraceque longioribus. 



Femina segmento ventrali penultimo truncato, ultimo breviter emarginato, 

 apice pilosello ; antennis capite thoraceque haud longioribus. 



Rocky Mountains, from the Black Hills northward into the 

 Hudson Bay Territory. A beautiful species, allied to L. nuttalli, 

 but differing by the color, and by the hind trochanters not being 

 armed with a tooth on the inner edge. The middle tibiae are 

 curved, and the outer spur of the hind tibiae broad, concave, and 

 somewhat acute. The penultimate ventral segment in the male 

 of L. nuttalli is broadly emarginate as in the present species, 

 but the hind trochanters are armed with an acute spine, which 

 in the female becomes a prominent angle. In L. cyanipennis 

 the hind trochanters are similarly armed, but the penultimate 

 ventral segment is acutely emarginate. L. solids appears to be 

 a variety of L. cyanipennis, but the condition of the specimens 

 is very bad and renders the comparison unsatisfactory. 



