N«.2301. DESCRIPTIONS OF NEW SAWFLIES—ROHWER. 105 



In these the anterior margin of the clypeus is broadly, shallowly, 

 arcuately emarginate; the frontal foveae are large; the interradius is 

 interstitial with the third intercubitus; the second cubital is narrower 

 below ; and the apical part of the first abcissa of the anal vein forms a 

 spur at the base of the lanceolate cell. 



Genus SENOCLIA Cameron. 



As far as can be determined with certainty, the genus Senoclia 

 Cameron contains only two described species — coerulea Cameron and 

 cyandla Cameron. The last-mentioned species was considered by 

 Kirby to be a synonymon of purpurata Smith, but as the type locali- 

 ties are so widely separated it is desirable that the synonymy be 

 confirmed. Senoclia, alhocoerulea Bingham does not belong to this 

 genus but is the type of Zasenoclia. Other metallic blue Blenno- 

 campids have been described from the oriental region, but it is 

 impossible to place them generically from the descriptions. Some 

 few of them can, however, be placed in the related genus Senoclidea 

 Rohwer. The species of Senoclia represented in the collection of the 

 United States National Museum may be distinguished by the fol- 

 lowing key: 



1. Exterior bases of tibiae whitish; wings basad of stigma nearly hyaline 



diascoreae, new species. 



Tibiae unicolorous black; wings uniformly violaceous or with a subhyaline area 



basad of basal vein in which case the base of wing is dark 2 



2. Female 11 mm.; male with wings uniformly violaceous; head more distincly punc- 



tured and with stronger antennal furrows bilanga, new species. 



Female 9-10 mm.; male with apical three-fourths of median and submedian cell 

 subhyaline coeru lea Cameron 



SENOCLIA DIASCOREAE, new species. 



The white at the bases of the tibiae and the hyaline basal part of 

 wings easily distinguishes this species from other species of the genus. 



Female. — Length, 11 mm. Clypeus flat, the apical margin trun- 

 cate; supraclypeal area flat, triangular in outline; middle fovea large 

 keystone-shaped in outline, the middle area convex, the handle of 

 the "key" partially breaking through frontal crest; antennal furrows 

 deep but partly interrupted opposite frontal crest; ocellar basin well 

 defined, somewhat transversely elliptical in outline; postocellar fur- 

 row distinct, angulate, with a furrow from angulation to anterior 

 ocellus; postocellar line distinctly shorter than ocellocular line; 

 postocellar area sharply defined, convex, nearly twice as wide as long; 

 third antennal joint distinctly longer than the fourth which is sub- 

 equal with the fifth; nervulus one-fourth its length from basal; 

 sheath broad, nearly parallel-sided, obtusely rounded apically. 

 Metallic blue with a purplish tinge; antennae and legs, except a 

 yellowish spot on exterior bases of tibiae, blackish; wings brownish, 



