708 BOSTON JOURNAL 



tlie intermediate vitta is a rugous space, witli a slightly elevated 

 line : wings hyaline ; nervures and carpus blackish ; cubital cel- 

 lules three ; metathorax rugous, with an elevated line : abdomen 

 longitudinally rugous, oblong ; with three larger segments, de- 

 creasing in length ; and three smaller ones at tip, taken together 

 hardly longer than the third : pectus in the middle black. 



Length one-fourth of an inch. 



The magnitude of the three basal segments of the abdomen is 

 remarkable in this species. 



9. B. TRANSVERSUS. — Granulated; nervure from the stigma 

 nearly transverse. 



Inhabits Indiana. [256] 



Body densely punctured or granulated ; blackish-piceous : an- 

 tennae, mouth and feet honey-yellow : wings hyaline ; nervures 

 brown ; stigma large ; nervure from the stigma to the second 

 cubital cellule nearly transverse, so as to make the three angles 

 at its contact, equal : tergum dull honey-yellow at base ; first seg- 

 ment with tM'O prominent, parallel lines ; second segment occu- 

 pying three-fourths of the whole surface : oviduct shorter than 

 the abdomen. 



Length over one-twentieth of an inch. 



The whole surface has a minutely granulated appearance, and 

 the nervure froiia the stigma is more than usually transverse, 

 having but a very slight obliquity. In having but two principal 

 s=egments to the abdomen, this species approaches the genus 

 tSigalphus, but the venter is not deeply vaulted as in that genus. 



10. B. MELLiTOR. — Honey-yellow ; antennfe dusky. 



Inhabits Indiana, 



% Body honey-yellow, yolished : antennae dusky : thorax im- 

 maculate ; wings hyaline; nervures fuscous; stigma yellowish at 

 base; 2d cubital cellule as long as the first, but somewhat nar- 

 rower than the greatest width of the latter : tergum short, oval, 

 not polished ; paler than the thorax, with minute, prostrate hairs; 

 f^econd segment with an indented dot each side : oviduct black, 

 as long as the abdomen : tarsi, terminal joint blackish. 



Length of the body three-twentieths of an inch. 



The wing-stigma is sometimes almost entirely black. [257] 



[Vol. I. 



