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PKOCEEDINGS OP THE NATIONAL MUSEUM 



VOL. 78 



tion of a forward curvature at apex and the face conspicuously pro- 

 truded below, and the other with a distinct forward curvature of the 

 auxiliary vein at apex, and the face not conspicuously protruded 

 below. The present genus has no forward curvature of the apex of 

 the auxiliary vein (fig. 10), and the face though more or less pro- 

 truded is transversely wrinkled or furrowed (fig. 9). 



Genotype. — Marbenia pecuUaris, new species. 



This genus is dedicated to Dr. Marcus Benjamin, editor of these 

 Proceedings, as a mark of respect by the author. 



MARBENIA PECULIARIS, new species 



Female. — Head shining testaceous yellow, lower half of face 

 fuscous, central portion of f rons and upper occiput yellowish brown ; 



antennae deep black, third seg- 

 ment testaceous yellow ; aristae 

 r^^^K fuscous; palpi fuscous, frontal 



Figure 9. — Marbenia peculiaris. 

 Left, head from the side ; 

 Right, head from in front 

 (incomplete) 



Figure 10. — Marbenia peculi- 

 aris, wing 



and facial orbits white dusted. Thorax brownish black, dorsum 

 darkest and with slight whitish grey dust, not vittate ; humeral angles 

 and the scutellum testaceous yellow. Abdomen blackish brown, un- 

 marked. Legs fuscous, tibiae each with a narrow annulus beyond 

 middle and the extreme apex testaceous yellow, basal three segments 

 of all tarsi yellow. Wings rather evenly infuscated, with yellowish 

 white hyaline markings as in Figure 10, the veins on pale parts yel- 

 lowish, on other parts dark. Calyptrae and halteres yellow. 



Head in profile and from in front as in Figure 9. Thorax with 

 two pairs of postsutural dorsocentrals and no acrostichals, the sur- 

 face hairs fine and short; scutellum bare on disc, with four marginal 

 bristles. Legs normal, mid tibia with a well developed apical ven- 

 tral bristle, no i^reapical dorsal bristle evident on any pair. Venation 

 as in Figure 10. 



Length, 3.5 mm. 



Type.— Cat. No. 43127, U.S.N.M. Portobello, Panama, March, 

 1911 (A. Busck). 



U. S. GOVERNMENT PRINTING OFFICE: 1910 



