196 Journal of the Mitchell Society [3Iay 



Clypeus elongate, longer than the frons with distinct lateral and cen- 

 tral carina. Compound eyes with ventral sinus rather deep. Pro- 

 notuni narrow, deeph^ and broadly notched posteriorly ; breast plates 

 rather small ; three mesonotal carinse rather sharp ; subcostal cell about 

 twice as long as broad. Male plates with the inner margins with a 

 distinct notch on basal half, apical tooth very blunt and short. 



Color: General color blackish fuscous; beak and legs ochraceous 

 buff with the tip of the former and the tarsi spotted with blackish. 

 Fore wings blackish fuscous, veins darker, covered in fresh specimens 

 with dark bluish powder. Hind wings smoky, snbhyaline ; veins 

 blackish. 



Length, apex of head to apex of abdomen 1.75 mm. ; to apex of 

 wings 3.15 mm. ; width of pronotum .98 mm. ; wings expanse 8.40 mm. 



Holotype £ . New Haven, Conn., July 2, 1920. B. H. Walden. 



Allotype 9 . North Branford, Conn., July 2, 1920. B. II. Walden. 

 On Salix. 



Herpis australis n. sp. 



Fig. 620 



This is a medium large, blackish fuscous species with light yellow 

 venter and legs; and distinct genitalia. 



Vertex nearly twice as wide as long, rounded anteriorly, separated 

 from the frons by a very faint carina ; frons nearly three times as long 

 as broad, side margins strongly refiexed but little narrowed between 

 the eyes ; clypeus long, nearly as long as the frons ; subantennal plate 

 stronglj^ elevated. Pronotum short, deeply excavated, posteriorly. 

 Mesonotum long, weakly tricarinate on the anterior border ; wings long 

 and narrow ; venation typical. Male plates large, separated about the 

 widtli of their bases basally, the inner margins converging and nearly 

 meeting in the middle of their length then widely converging apically 

 ending in long sharp recurved spines. This species bears a general 

 resemblance to our northern Herpis vulgaris Fitch but it averages 

 somewhat smaller and the genital plates are entirely distinct. 



Color: General color blackisii or brownish fuscous; venter and 

 legs pale yellow, more or less covered with bluoish powder; head 

 mostly brownish testaceous ; lateral margins of the elyi)eus and frons 

 bordered by a broad blackish stripe ; eyes blackish ; geiue and lateral 

 margins of the clypeus blackish fuscous; pronotum yellowish testa- 



