404 HYMENOPTEEA. 



notum with numerous ill-defined areae. Abdomen a little shorter than the head and 

 thorax united ; shining, the apex covered with rather long fulvous hair ; sheaths of the 

 ovipositor black, pilose, their apices fuscous. 



b. Body reddish ; wings uniformly fuscous or blackish. 



The species in this section are smaller than those in the preceding, and are reddish, 

 not yellow, in coloration. They also have the ovipositor longer. 



/v 6. Microdus maculipes. 



Ferrugineus, antennis, trochanteribus posterioribus, apice tibiarum posticarum tarsisque posticis nigris ; alis 



fumatis. g . 

 Long. 8 millim. 



Hab. Guatemala, San Geronimo (Champion). 



Antennae microscopically pilose, the flagellum inclining to fuscous on the underside. 

 Face obscurely punctured ; tips of the mandibles black ; frontal depression separated 

 into two by a wide furrow. Mesonotum sparingly punctured, the middle lobe not 

 very distinctly separated. Metanotum deeply transversely sulcated at the base ; with 

 three short central areae (the lateral of which are a little longer than broad, rounded at 

 the base, and narrowed towards the apex), and three apical areee (the lateral ones very 

 deep) ; all the keels stout and projecting. Abdomen a little longer than the head and 

 thorax united, somewhat dilated towards the apex. Areolet slightly oblique, narrow ; 

 the nervures straight, united at the top. 



/t 7. Microdus femoratus. (Tab. XVI. fig. 17, $ .) 



Ferrugineus, capite, antennis, sterno, pleuris pedibusque nigris, ore femoribusque posticis rufis ; alis fuscis. $ . 

 Long, fere 7 millim. ; terebra 1*5 millim. 



Hab. Mexico, Northern Sonora (Morrison). 



Antennae microscopically pilose, as long as the body. Head shining, impunctate, 

 the sides and the lower part covered with silvery-white hair. Thorax shining, impunc- 

 tate, the sides covered with silvery-white hair ; metanotum without keels, except a 

 transverse one at the base and a longitudinal one at the sides. Abdomen a little 

 shorter than the head and thorax united; with a large triangular red space on each 

 side on the pleurae above in front. Knees testaceous, the spurs white, the fore tibiae 

 and tarsi more or less obscure testaceous in front. Areolet narrow, oblique; the 

 nervures straight, united at the top. 



