108 GEO. H. HORN, M. D. 



Cantharis inonilicornis Duges. Is a true Cantharis, apparently dis- 

 tinct friim any in our favma. 



Cantharis erythrotliorax Mendoza y Hen-era. Is a true Cantharis- 

 It is related to C. mutilata Horn, but the two are distinct. The former has 

 constantly two black spots on the red th(n-ax and differs also in its sexual 

 characters. 



Tetraonyx Temoralis Duges. Resembles /ron^a/j'sChev., but the femora 

 are yellow except at tip and base. The same species occurs in Arizona. 



Tetraonyx riiTiis Duges. Is fulvus Lee. 



Neuiognatlia zonitoides Duges. Is most closely related to but distinct 

 from spar.<ia Lee. 



HIACROBASIS Lee. 



M. purpurea n. sp. — Piceous, spar.'rely clothed with cinereous pubescence, 

 elytra purplish with narrow sutural, median aad marginal cinereous vittse. An- 

 tennae slender, setaceous, brown. Head large, moderately closely punctate? 

 sparsely clothed with cinereous pubescence, vertex with a large purplish spot with 

 median cinereous line. Thorax quadrate, narrower than the head, anterior angles 

 rounded, median line moderately impres.sed, moderately closely punctate, clothed 

 with cinereous hair, disc with large purple spot with median cinereous line. 

 Elytra very little wider than the head, purplish clothed with purplish pubescence 

 with the suture and margin narrowly cinereous and a median vitta of the same 

 color. Body beneath moderately closely punctate, sparselj" clothed with cinereous 

 pubescence. Legs brownish. Length .42 inch; 10.5 mm. 



Male. — Anterior tibiae with one spur. First joint of antennae as long nearly as 

 the four following, arcuate gradually wider from base, not contorted at apex, 

 second joint nearly as long as the two following. Sixth ventral segment feebly 

 emarginate at tip. 



This species belongs to that division of Macrubasis in which the first 

 joint of the antennaj % may be called very long, and should be placed 

 with those species with one anterior tibial spur, from all of which it dif- 

 fers in the much longer second joint of the antennae and the surface 

 ornamentation. 



One specimen. Arizona. 



HI. lauta n. sp. — Form slender, rufo- testaceous or pink, sparsely clothed with 

 cinereous pubescence, legs black. Antennse slender, setaceous, black. Head finely, 

 densely punctate. Thorax longer than wide, sides in front convergent, posteriorly 

 parallel, densely finely punctate. Elytra wider than the thorax, densely punctu- 

 late, pubescence very fine. Body beneath moderately densely punctate, pubes- 

 cence cinereous and longer. Legs black, femora rufo-testaceous with black knees. 

 Length .48-.56 inch: 12-14 mm. 



Male. — Antennae with first joint about as long as the next two, slightly arcuate, 

 joints 2-11 equal in length. Anterior tibiae with one spur; first joint of anterior 

 tarsus much compressed, not pubescent beneath. Last ventral segment scarcely 

 emarginate. 



Female. — Antennae not very difl^erent from male, the first joint shorter. Ante- 

 rior tibiae with two spurs, the first joint of tarsus not compressed, pubescent be- 

 neath. 



