NORTH AMERKMN HYMENOPTERA. 205 



narrower head, larger palpi, with the mandibles grooved towards in- 

 sertion iu the middle area ; in the wholly black meso-thorax, except 

 the yellow tubercle, and in the abdomen having an additional pair 

 of fasciae. The tip of the abdomen is scarcely one-half as large, of 

 different proportions, being longer and narrow^er than in C. singalaris, 

 while the abdomen is much flattened above, where in C .singularis 

 it is much more convex." 



97. Crabro septeiitrioualis Pack. 



Crabro septeutnniialis Packard, 1. c, p. 110, 9- 

 " 9 • Head short, broad, transversely oblong, being one-half as long as broad, 

 body long and flattened, finely pnnctured, vertex flattened, slightly depressed ; 

 ocelli arranged in a low triangle, which is nearly equilateral ; eyes wide apart as 

 usual ; surface concave in front of the ocelli ; antennal groove well marked ; or- 

 bits on each sid? lined with a broad track of golden pubescence like the clypeal 

 region ; clypeus as long as broad, acutely produced on the front edge, but trun- 

 cate at tip, strongly carinated, black ; mandibles as usual bidentate, yellow, black 

 at tip. Antennae of the usual proportion, scape a little compressed and angulated 

 longitudinally, slightly dilated in the middle, entirely yellow, flagellum black, 

 basal joint yellowish beneath, abdomen ferruginous. Prothorax with two nar- 

 row, yellow stripes, rather remote, one on each side. Thorax broad, somewhat 

 flattened above; on niesoscutum are two distinct submesial ridges and parapsidal 

 grooves ; surface finely and closely punctured ; a slight yellow spot, sometimes 

 absent, on the middle of the meta-scutellum. Tubercle on the flanks as usual. 

 Enclosure on propodeum distinctly marked, semi-elliptical, mesial furrow with 

 slightly ridged sides, on each side diverging rugae of unequal length, posteriorly 

 the lines more transverse and finer, with a few scattered gray hairs. Tegulse 

 ferruginous, nervnres dull ferruginous. Fore femora black, tibiae yellow, ferru- 

 ginous within, tarsi yellow, shaded on the sides with pale ferruginous, middle 

 femora black, yellow at tip beneath, tibiae yellow, with a large oval black spot 

 within, hind pair tubercnhited and unusually spinulated ; tarsi yellowish, ungues 

 ferruginous; hind femora black, lined within witii a silvery pubescence forming 

 a regular line of long, silvery, evenly-cut hairs; basal joint of tar.si yellow, fer- 

 ruginous at tip, remaining joints wholly reddish. Abdomen broad and flattened, 

 convex beneath, a little longer than the head and thorax together, with five pairs 

 of fasciae, those on basal segmeut reduced to single square dots; those on second 

 segment are broader than the others, third pair longer, narrower and nearly con- 

 tiguous on the mesial line of the body ; those on the fifth rings unite to form a 

 coutinuous band, more ovate and broader than the others. Beneath black, edges 

 of segments obscurely testaceous. Length of body, .54 ; head and thorax together, 

 .26; abdomen, .28 inch. 



" Hudson Bay Territory (coll. Norton) ; Maine, Brunswick, and 

 head waters of Penobscot (Packard)." 



This evidently belongs to group nigrifrous, and is not unlikely 

 identical with that species. 



TKANS. AM. ENT. SOC. XXII. JUNE. 1895. 



