212 Journal of the Mitchell Society [Maij 



Length, apex of head to apex of abdomen 2.80 mm. ; to tips of 

 wings 3.50 mm. 



Holotype $ . Chicago, 111., July 25. W. J. Gerhard. 



Liburnia waldeni n. sp. 



Fig. 698 



This species may be recognized by its uniform dull brown color 

 and short male pj^gofer. 



Vertex rather narrow, elongate ; carin^e fairly distinct over the 

 apex of the head; frons narrowed between the eyes, a little arched 

 below ; antennae reaching well beyond the clypeal margin ; pronotum 

 nearly as long as the vertex, the lateral carinae not strongly reflexed; 

 pygofer of the male short, truncate caudally, the genital aperture 

 large, the genital styles long, ligulate, a little arched, their apices acute 

 meeting in the median line just below the anal segment, which is 

 definitely incised on the ventral margin and triangularly produced 

 on each side. 



Color : General color dull blackish brown ; antenna and legs 

 buffy, lateral margins of the abdomen with large pale spots, wings 

 brownish, the veins darker. 



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

 wings 3.30 mm. 



Holotype S . New Haven, Conn., August 8, 1920. B. H. Walden. 



Criomorphus conspicuus n. sp. 



Figs. 105, 391, 392, 549, 635 



This species has a general resemblance to Phyllodinus flaheUafus 

 Ball but the tibia* are terete, not expanded and the median frontal 

 carina is forked on the clypeal margin. 



Head wide, about as wide as the pronotum ; vertex about as broad 

 as long; median carina short, the lateral compartments elongate, 

 reaching almost to the base of the vertex; posterior margin of the 

 vertex nearly straight; anterior margin slightly arched; frons about 

 twice as long as broad, lateral margins curved ; median carina of the 

 frons forked nearly to the clypeal margins, the two prongs of the fork 

 conspicuous on the apex of the head ; antennae with first segment 

 about half as long as second, the second segment clavate. Pronotum 



