780 BOSTON JOURNAL 



MACROCERA Latr. 



1. M. OBLIQUA. — $ Thorax with yellowish hair; tergum 

 fasciate, second segment with an oblique band. 



Inhabits Indiana. 



Body black : head and stethidium with long, dull yellowish 

 [404] hair : hypostoma and labrum yellow : antennae, excepting 

 the basal joint, beneath piceous : mandibles yellow at base, with 

 a piceous spot, honey-yellow in the middle and blackish at tip : 

 wings slightly fuliginous ; nervures dusky : tergum, first seg- 

 ment at base, with hair as on the thorax ; second segment with a 

 broad basal margin of whitish prostrate hair, and a narrow oblique 

 one on the middle; third and fourth segments with oblique 

 bands of the same color on their middles ; fifth with the band 

 obvious and a little oblique, intermixed with longer hairs. 



Length nearly three-fifths of an inch. 



I have numerous specimens, all of which are males. The hair 

 of the head and thorax is slightly tinted with ferruginous. 



2. M. BINOTATA. — Black; wings blackish. 

 Inhabits Indiana. 



9 Body black : head and thorax, particularly the latter, with 

 short hair, that of the occiput and behind the seutel a little 

 longer : labrum with prostrate hair : wings blackish violaceous : 

 tergum on some parts, with a slight purplish reflection ; fourth 

 segment with a transverse-quadrate white spot of prostrate hair 

 on each side, upon its posterior margin : posterior tibiae and tarsi, 

 with the long hairs whitish. 



Length about nine-twentieths of an inch, 



'^ A little smaller than the female ; nasus and labrum pale 

 yellow ; antennae beneath, dirty yellowish ; wings not so dark as 

 in the female ; tergum immaculate. 



Although it has some points of specific similarity with the 

 preceding, yet it difi"ers so widely from it in other respects, that 

 with much hesitation, I have concluded to give it a distinct 

 place. [405] 



3. M. PRUINOSA. — Tergum with much dilated white bands : 

 double on the second segment ; hair on the thorax yellowish. 



Inhabits United States. 



[Vol. I. 



