NO. 1930. DEfiCRIFTIONS OF NEW SAWFLIES—ROHWER. 209 



verging to the clypeus, the position of the transverse median and 

 other characters. In habitus this is related to Taxonus Hartig, but 

 the hind basitarsis is much shorter than the following joints united, 

 so it falls in AUantini. 



Clypeus broad, short, very deeply emarginate, malar space wanting; 

 eyes large, strongly converging, separated at the clypeus by but little 

 more than their length; posterior orbits broad, but their greatest 

 diameter less than the cephal-caudad diameter of the eye; antennae 

 rather stout, thickened in the middle, third joint much longer than 

 the fourth, pedicelluin but Uttle longer than the apical width; vena- 

 tion very like Taxonus; transverse median distinctly, but not 

 markedly, basad the middle of the cell; tarsal claws bifid, the inner 

 tooth shorter. , 



Type. — Monophadnus hengalensis Cameron. 



Genus MONOSTEGIA Costa. 



MONOSTEGIA NEARCTICA, new species. 



From Monostegia martini MacGillivray this may be distinguished 

 by the pale clypeus and scutellum. 



Female. — Length 6.5 mm. Apical margin of the labrum broadly 

 rounded; clypeus broadly, arcuately emarginate, lobes low rounded 

 apically; supraclypeal foveas confluent with the antennal foveas; 

 supraclypeal area gently convex; middle fovea elongate extending 

 to the anterior ocellus; antennal furrows complete; postocellar line 

 shorter than the ocellocular line ; postocellar furrow present ; posto- 

 cellar area about one-third broader than long; third antennal joint 

 one-third longer than the fourth; stigma gently rounded below; 

 sheath straight above, rounded apically (more strongly so ventrally). 

 Reddish yellow; head (except clypeus, labrum, and mandibles), 

 prescutum and scutum (except sutures), mesopectus and sheath 

 black; wings dusky hyaline, venation dark brown. 



Male. — Length, 6.5 mm. Hypopygidium gently rounding to a 

 truncate apex. Differs from the female in the piceous antennae and 

 in having a large part of the mesepisternum black. 



Newtonville, Massachusetts, June, 1906. Bred specimens issuing 

 June 24-25, 1906. Host ? 



Type.— Cat. No. 14699, U.S.N.M. 



Genus PSEUDOSIOBLA Ashmead. 

 This genus belongs to the tribe Eriocampini. 



PSEUDOSIOBLA FLORIDANA (Provancher). 



Three males from Newington, Fairfax County, Virginia, May 30, 

 1911, and June 4, 1911 (S. A. Rohwer), differ from the type only in 

 the following characters: labrum, clypeus entirely and tegulae black; 

 48702°— Proc.N.M.vol.4S— 12 14 



