THE CANADIAN ENTOMOLOGIST. 51 



posterior margins, an ill-defined median line and patches at the middle of 

 the sides metallic-blue. Scutellum and post-acutellum bright metallic-blue. 

 Pleura and coxae silvery. Abdomen above deep blue, passing from 

 greenish to a violaceous-tinge towards the tip, segments 6, 7 and 8 

 marked with gold at the hind angles, the seventh with a fine golden hind 

 margin. Claspers violet-scaled. Sixth and seventh segments laterally 

 expanded, reaching their greatest width at the tip of the seventh. No 

 caudal tufts. Lateral abdominal cilia pale on all the segments but the 

 last, dark on the eighth and the genitalia. Abdomen beneath yellowish- 

 silvery, with a median blue stripe. The stripe is widest on the third and 

 fourth segments, and narrows to a fine line on the sixth and seventh. 

 Eighth segment violaceous beneath, tipped with gold. Legs deep violet 

 and blue, the hind tarsi only white-marked. Under surface of the femora 

 bright brassy. On the hind legs the fourth and fifth tarsal joints are 

 silvery-white on the outer side, black on the inner. Length, 9.5 mm. 

 (exclusive of appendages). 



Type.— Cat. No. 10, 146, U. S. Nat. Mus. 



Locality. — Bluefields, Nicaragua. (W. F. Thornton.) 



TWO NEW BEES OF THE GENUS TRIEPEOLUS. 



BY T. D. A. COCKERELL, BOULDER, COLO. 



Triepeolus grindeli(z, n. sp. — 5. Length ro-ii mm.; black, the 

 legs red, with black spurs ; pubescence pale cinereous, with a slight 

 yellow lint. Wings nearly clear ; tegulas orange ferruginous ; mesothorax 

 with two short longitudinal bands of pubescence ; antennaj black except 

 the third joint and extreme base of fourth, which are dull red ; clypeus 

 with very dense minute punctures, and scattered larger ones ; labrum 

 black ; mandibles largely red ; lower part of pleura bare, densely punc- 

 tured ; scutellum rather prominent, bilobed ; lateral teeth black, short but 

 rather sharp ; broad apical bands on abdominal segments i to 4 entire ; 

 transverse black area on first segment as in helianthi, occidentalis, etc ; 

 oblique patches at sides of second segment pointed, and making an angle 

 of about 45° with apical band ; apical segment reddened ; pygidial area 

 large and circular ; last ventral segment curved downwards at apex. By 

 the shape of the last ventral segment, and the comparatively small size, it 

 is allied only to the Californian T. callopus, Ckll., from which it differs by 

 the larger size, grayer pubescence, circular (instead of oval) pygidial area, 

 black labrum, more strongly bilobed scutellum, etc. 



February, 1907 



