DICRANOMYIA. IT 



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

 although small. 



The following species from California is not included in the 

 dichotomical table of page 60. 



20. D. marmorata 0. S. % . — Cinereo-fusca, thorace vittis tribus 

 fuscis ; alis cinereo-nebulosis, stigmate quadrangulari, fusco ; fernorum 

 apicibus infuscatis. 



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

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

 corp. 0.4. 



Syn. Dicranomyia marmorata 0. Sacken, Proc. Ac. Nat. Sc. Phil. 1861, p. 288. 



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

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

 the middle ; thorax cinereous, with three brown stripes ; abdomen 

 brownish cinereous, posterior margins of the segments pale ; 

 halteres pale ; feet yellowish, tips of femora, of the tibias, and of 

 the tarsi brown ; wings subcinereous with some darker clouds and 

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

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

 stigma obscure-cinereous, elongated, quadrangular ; the hyaline 

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

 in 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 longitudinal 

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

 wing, inclosing the stigma and the two clouds of the prasfurca, 

 and extending more or less towards the posterior margin, across 

 the discal and the posterior cells ; its outline is very indefinite, 

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

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

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

 praefurca ; the subcostal cross-vein is a short distance before its 

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

 corresponds to its base. 



Eab. California ; two male specimens (Mr. A. Agassiz). This 

 species is related to D. humidicola 0. S. 



