12 PROCEEDINGS OF THE NATIONAL MUSEUM vol.74 



Nine females showing about the same distribution as discoldalis. 

 Type taken August 5, 1917, by K. M. Fouts; two, Glen Echo, R. M. 

 Fouts; one, Glencarlyn, Va., August 18, 1912, J, R. Malloch; one 

 Langdale, Ala., H. H. Smith; one, Texas, Belfrage; one, Boulder 

 County, Colo,, May 9, 1926, Charles H. Hicks, under his No. 150; 

 one, Quebec Province, Canada; and one without data. 



MESSATOPORUS COMPRESSICORNIS, new species 



This and the following species are very easily distinguishable from 

 the other two species by the characters used in the key, especially in 

 their distinctly compressed antennae. 



Female. — Length, 9 mm. 



Temples rather strongly convex; occipital carina high; vertex 

 behind ocelli distinctly higher than at posterior ocelli; frons with a 

 deep median groove; eyes convergent below in the ratio 5:4; com- 

 bined face and clypeus barely as long as broad, face distinctly sha- 

 greened and very sparsely punctate; clypeus barely a third as long 

 as interfoveal line, distinctly inflexed from middle and with a dis- 

 tinct reflexed margin, apex very broadly and slightly concavely trun- 

 cate; antennae as long as body, flagellum very slender at base, 

 strongly flattened toward apex. Thorax polished, at most very 

 sparsely punctate, sternauli and prepectal suture not foveolate, meso- 

 pleural groove foveolate, pronotal impression striate, subalar im- 

 pression smooth; scutellum strongly convex; apical carina entirely 

 wanting; subdiscoideus above upper third of postnervulus ; coxae 

 polished, sparsely and coarsely punctate. Abdomen subpolished; 

 sheath as long as abdomen beyond first tergite. 



Color and color pattern much as in discoiddlis., but differing as 

 follows: Scape not pale in front; antennal annulus centering on 

 seventh flagellar joint; several of the sutures of flagellum beyond 

 the annulus with a small white sjDot on outer side below; post- 

 scutellum pale; all coxae pale yellow with larger or smaller black 

 markings above and below; front and middle trochanters and basal 

 joint of hind trochanter j^ellow, the middle and hind ones black at 

 base; front and middle femora testaceous; front and middle tibiae 

 and tarsi stramineous ; hind tibia testaceous, paler at base and black 

 at apex; hind tarsus white, extreme base black; calcaria black, 

 apically reddish. 



Male. — More slender than female; face narrower; flagellum less 

 strongly compressed at apex ; scajDe pale in front ; annulus centering 

 on flagellar joint 10; front and middle legs paler and practically 

 without black markings; apical joint of hind trochanter largely 

 black, tibia black and white. 



