54 PROC. 3NT. SOC. WASH., VOL. 22, NO. 3, MAR., 1920 



rufous, rather broadly edged with piceous. Tips pale. Under parts piceous, 

 legs piceous, with exception of the coxae, knees and tarsi which are pale. 

 Length 6.5-12 mm. 



Male has the rami of the antennal club slightly prolonged and has the 

 terminal ventral segment with a median raised portion, strongly depressed 

 on either side. 



Female has the surface of the terminal ventral even, not depressed laterally. 



Mexico: Venodio, Sinaloa, late June, July and August; Tehuan- 

 tepec, Oaxaca, July 7; Mazatlan, Sinaloa, September 15. Type 

 from Venodio. 



Described from twenty-three specimens. 



Type. No. 22557, U. S. N. M. 



Corinthiscus spinolae, new species. 



Form similar to C. sinaloae but larger. Head, pronotum, meso- and meta- 

 sterna piceous, elytra pale with dark spots, abdomen pale, legs pale with 

 knees piceous. Head much as in the preceding species but the punctures are 

 slightly finer. Scape and funicle of antenna reddish chestnut, club darker. 

 Palpi rufo-testaceous. Thorax slightly longer than broad (33:29), form 

 similar to that of C. sinaloae but without the lateral depressions and with 

 the median fissure very much less distinctly marked. The post median 

 smooth space is not raised and is in the form of a narrow line. Elytral punc- 

 tures finer than in the preceding and become obsolete near apex. The ground 

 color is pale testaceous; the base is dark, the dark extending toward the 

 apex for a short distance at the humeri and on the disk, there is a medium 

 fascia which is broken into three spots on each elytron, the middle one of 

 which is larger and is more apical in position; near the apex is a transverse 

 fascia apparently composed of four large spots, two on each elytron, the 

 spots just touching. Under parts of the thorax piceous, of the abdomen 

 pale. The legs are pale but for the knees which are dark, the dark color 

 sharply demarked from the pale. Length 11-12 mm. 



Described from four specimens, all females, collected at Venodio, 

 Sinaloa, Mexico, June 27 to July 10, 1918, A. Kusche, collector. 

 Type. No. 22558, U. S. N. M. 



DESCRIPTIONS OF SIX NEW WASPS (HYM.). 

 BY S. A. ROHWER, Bureau of Entomology. 



The six new wasps described in the following pages were sub- 

 mitted for identification by Dr. Chas. Robertson. The types of 

 all of them are in the collection of the U. S. National Museum. 



Elis floridanus, new species. 



In size, appearance and structure this new species is much like 

 interrupta (Say) , but it can readily be distinguished by the yellow 



