THE CANADIAN ENTOMOLOGIST. 409 



than the combined lengths of the following segments ; segments 3 and 4 

 subequal ; segments 5 and 6 subequal and about one-half longer than 3 

 or 4 ; segment 7 apparently twice, or nearly, the length of 5 or 6, narrow- 

 ing caudad, and the 8th segment much narrower, conic, but nearly as long 

 as segment 7 ; abdomen longer than head and thorax combined, but not 

 much longer ; sheaths of the ovipositor not exserted or prominent. Body 

 moderately stout, the thorax long, abdomen stout and pointed ; metallic. 

 Metanotum smooth, the median line as in the male, on each side of it a 

 longitudinal roughened impression, and a deep reticulated impression 

 running cephalo-laterad from the side of the neck, along the margin to 

 about a point near the insertion of the caudal coxae. Meso-pleura smooth, 

 excepting those of the mesoscutum and prothorax. Base of the meso- 

 postscutellum impressed and rugose, the sclerite peltate, its cephalic 

 margin straight, the lateral margins obliqued caudo-mesad, margined, 

 shining, acute at the meson. Caudal coxae twice the size of the inter- 

 mediate ones. Tarsi 4-jointed, the apical joints long. Ovipositor not 

 exserted. 



Female. — Length, 1.56 mm. 



General colour metallic dark cyaneous (dark indigo, or Fiench, blue), 

 the abdomen darker, with a brassy sheen and purplish reflections j eyes 

 purple-lake, clothed with short stiff hairs, the ocelli ruby-red ; knees, tibiae 

 and tarsi white, with the exception of some brownish on the outer (dorsal) 

 aspect of the tibiae near the base and the brownish-black apical tarsal 

 joints ; trochanters pallid ; tegulae concolorous. Wings hyaline, the 

 venation pallid-yellow j antennae shining black, metallic bluish-black in 

 bright lights. 



Sculpture of the mesoscutellum less dense than that of the meso- 

 scutum and difl:erent in appearance, but of the same general character ; 

 coxae glabrous, brilliantly polished. Petiole, or first abdominal segment, 

 concolorous with the abdomen, rugose, as long as the caudal coxae, 

 cylindrical and moderately stout ; discal cilia of fore wings, proximad, 

 moderately long, longer than those apicad, the apex of the wing broadly, 

 oblato-convexly rounded ; lateral ocelli farther apart than each is from the 

 cephalic ocellus ; mesoscutum and the caudal margin of the pronotum 

 with several long, slender, stiff, white hairs, one of which arises from a 

 setigerous puncture near the base of the incomplete parapsidal furrows ; 

 head with similar, but much shorter and more numerous, hairs, and the 

 scutellum with several of the long ones, one arising from the lateral 



