1G2 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. 



LYTTA Fabe. 



46S. £,. puberula. Nigro-picea seuescens, pube pallida erecta ves- 

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

 transversira positis, latitudine paulo brevioie lateribus rotundatis ; 

 elytris thorace fere duplo latioribus, confertissiine 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, IT. 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. L,. viridana. Laete viridisnea, capite thoraceqne pernitidis, 

 illo parce punctato, puncto verticali rubro, hoc punctis paucis iinpressis, 

 subpentagono, lateribus ante medium obtuse angulatis, disco bifoveato, 

 canaliculato, antice posticeque transversim impresso, margine basali 

 latius refiexo ; elytris thorace plus sesqui latioribus, elongatis parallelis, 

 dense rugosis ; subtus cyanea ; trocbanteribus 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 ; antennis capite thoraceque longioribus. 



Femiua segmento ventrali penultimo truncato, ultimo breviter emarginato, 

 apice pilosello ; antennis capite thoraceque baud 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 tibia? are 

 curved, and the outer spur of the hind tibia? 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. cyam'pennis 

 the hind trochanters are similarly armed, but the penultimate 

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

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

 is very bad and renders the comparison unsatisfactory. 



