714 BOSTON JOURNAL 



5. M. ZONARIA. — Black : feet aud band on the terguin yel- 

 lowish. 



Inhabits Indiana. 



9 Body black, punctured : antennae fuscous ; beneath plceous, 

 dull; basal joint beneath honey-yellow: mouth honey-yellow: 

 palpi white : wings hyaline : radial cellule with the nervure not 

 strongly marked ; second cubital cellule very small, perfect : ab- 

 domen not elongated ; each side and band on the middle of the 

 tergum honey-yellow : oviduct half the length of the abdomen, 

 black : feet yellowish : posterior pair of tarsi dusky. 



Length one-tenth of an inch. 



The fasciated tergum is an obvious character. 



6. M. CARP ATA. — Black; stigma large, brown; feet honey- 

 yellow. 



Inhabits Indiana. 



9 Body black : antennae beneath and mouth piceous : palpi 

 white : thorax with the suture before the scutel not much dilated, 

 but having the cross lines ; wings hyaline ; [ 264 ] nervures 

 whitish : stigma large, triangular, light brown ; nervures Of the 

 radial cellule not visible, or but slightly towards the tip ; second 

 cubital cellule destitute of the exterior nervure : tergum oval, 

 somewhat polished ; first segment punctured : oviduct nearly or 

 quite as long as the abdomen : feet honey-yellow : wing-scale yel- 

 low. 



Length over one-tenth of an inch. 



The stigma of this insect is larger and the nervures paler than 

 those of any other species I have seen. 



7. M. BISSTIGMATA. — Stigma elongated, appearing double. 

 Inhabits Indiana. 



^ Body black, polished : antennae at base and mouth piceous : 

 thorax with two oblique sutures and one at the base of the scu- 

 tel : wings hyaline ; nervures pale brownish ; nervure of the ra- 

 dial cellule as distinct as the others, rectilinear, parallel with the 

 rectilinear part of the costal edge ; second cubital cellule desti- 

 tute of the exterior nervure; stigma much elongated, the length 

 being obviously more than three times the greatest breadth, 

 brown ; a stigma-like spot at the origin of the nervures of the 



[Vol. I. 



