DICRANOMYIA. "^"^ 



Side at the basis of the last tarsal joint of the male is distinct, 

 althousli small. 



The following species from California is not included in the 

 dichotomical table of page GO. 



OO D. marmoraf a 0. S. % .-Cinereo-fusca, thorace vittis tribus 

 ^ fuscis ; alis ciuereo-uebulosis, stigmate quadraugulari, fusco ; femorum 



apicibus infascatis. 

 Grayish-brown, thorax with three brown stripes; wings clouded with 



cinereous ; stigma quadrangular, brown ; tip of the femora brown. Long. 



corp. 0.4. 

 SvN. Dicranomyia marmorala 0. Sackex, Proc. Ac. Nat. Sc. Phil. 1861, p. 288. 



Rostrum, palpi, and antenna3 brown; joints of the latter sub- 

 globular, verticils short; front and vertex cinereous, darker in 

 the middle ; thorax cinereous, with three bro^yn stripes ; abdomen 

 brownish cinereous, posterior margins of the segments pale; 

 halteres pale ; feet yellowish, tips of femora, of the tibiae, and o 

 the tarsi brown ; wing, subcinereous with some darker clouds and 

 some hyaline bands and spots ; a cloud at the origin of the pra3- 

 furca, another, round one, at its tip; cross-veins also clouded; 

 stigma obscure-cinereous, elongated, quadrangular; the hyalme 

 spots are arranged in the following way : a small, rounded one 

 ii the anal angle ; a band running across the basal portion of the 

 two basal and the anal cells, and ending in the spurious cell near 

 the posterior margin ; a spot near the tip of the seventh lo"gitud.na 

 vein ; a large irregular hyaline space in the central portion of the 

 Xg inclosing the stigma and the two clouds of the pr.furca 

 and extending more or less towards the posterior margin across 

 the discal and the posterior cells; its outline is very indefinit 

 and it is interrupted by clouded marks along the veins; a smal 

 hyaline mark at the tip of the wing, in the submarginal cell. 1 e 

 tip of the auxiliary vein almost corresponds to the origin of the 

 J^furca- the subcostal cross-vein is a short distance before it. 

 tip ; the discal cell is present (closed), and the great cross-vein 



corresponds to its base. ,, . . ■„\ Tbi« 



Hab. California ; two male specimens (Mr. A. Agassiz). Ihi. 



species is related to D. humidicola 0. S. 



