210 Journal of the Mitchell Society [^lajj 



Liburnia fulvidorsum n. sp. 



Figs. 31, 705 



This species may be recognized by the pale yellow color of the 

 frons, vertex, thorax and legs ; wings and the abdomen largely black. 



Vertex about twice as long as broad, rounded anteriorly, carin£e 

 distinct; frons nearly parallel sided, very little broadened below; 

 antennae long, reaching the clypeal margin, the second segment twice 

 as long as the first; pronotum elongate, the posterior margin tri- 

 angularly notched; mesonotum short, the lateral carina? strongly 

 diverging; calcar foliaceous; rather broad; aperture of the pygofer 

 very broad, triangular below, the dorsal angles strongly produced: 

 genital styles broad, ligulate, truncate at the apex; anal segment 

 short. 



Color : Head excepting the black eyes pale yellow ; thorax in- 

 cluding the legs pale yellow, the metapleura with a fuscous spot; 

 brachypterous wings black, opaque; abdomen black, the posterior 

 segments broadly margined wuth yellow, the lateral margins broadly 

 yellow. 



Length, apex of head to apex of abdomen 2.10 mm. 

 Holotype $ . Brownsville, Texas, December 10, 1910. 

 Paratypes 2$ $ . BroAvnsville, Texas, December 10. 1910. 



Liburnia gerhardi n. sp. 



Figs. 703, 496 



This species may be recognized bj^ its general bright ochraceous 

 yellow color with the frons narrow and distinct genitalia. 



Vertex about one and one-half times as broad as long, distinctly 

 carinate, broadly rounded at the frons; frons narrow, elongate, the 

 sides a little arched below the eyes; antennaj elongate, the first seg- 

 ment about as long as the second; pronotum about as long as the 

 vertex, broadly sinuate posteriorly; mesonotum large, the scutellar 

 portion occupying about half its length, lateral carinte broadly di- 

 vergent ; calcar very large, foliaceous, nearly as long as the basal seg- 

 ment of the tarsus; genital aperture very large, ventral sinus tri- 

 angular, deep, the ventral angles a little produced, dorsal angles 

 strongly produced; genital styles contiguous at the base, the basal 

 angles roundly produced posteriorly, the stems strongly divergent, the 



