North American Hymenoptera. 263 



nenaire; apicial nervures obsolete: stigma triangular, 

 fuscous : abdomen oblong, subfusiform, more polished 

 than the thorax; 1st and 2d joints densely punctured or 

 minutely lineated ; the first joint pedunculiform, arcuated, 

 narrower than the second : venter along the middle pale 

 yellowish : feet honey-yellow : posterior tihi<B at tip and 



posterior tarsi dusky. 



Leno-th over one tenth of an inch. 



Resembles mellipes, but tlie thorax has not tlie oblique^ 

 lineated grooves; and the abdomen Is more elongated, 

 and slender at base. This basal segment, like that of 

 meilijpes, has a slight tubercle on each side. 



In June, 1822, I obtained eighty-four mdividuals of 

 this species from the larva of a Sphtnx. 



5. M. zonaria. Black ; feet and band on the 



yellowish. 



Inhabits Indiana. 



^ Body black, punctured: antenna, fuscous j beneath 

 piceous, dull ; basal joint beneath honey-yellow : mmfh 

 honey-yellow : palpi white : tcirtgs hyaline : radial cel- 

 lule with the nervure not strongly marked ; second 

 cubital cellule very small, perfect : abdomen not elongat- 

 ed • each side and band on the middle of the tergum 

 honey-yellow : oviduct half the length of the abdomen. 



terffura 



feet 



Leng 



tergu 



6. M. carpaia. Black; stigma large, brown; feet 



honey-yellow. 



Inhabits Indiana. 



9 Body black : antenn<s beneath and m^uth piceous : 

 palpi white : thorax with the suture before the .scute! 

 not much dilated, but having the cross lines : wings hya- 



