A'ol. xxiv] ENTOMOLOGICAL NEWS 20/ 



sharp behind ; disc of the first segment very shiny, the others a little 

 less so, all the segments very finely punctured, less conspicuously line- 

 olated; apical margins of the segments testaceous; discs of segments 

 4 and 5 and the sides of the other segments covered with thin, short, 

 pale gray hairs, thicker and more ochractous around the anal rima. 

 Pubescence scant, not very dense even on the legs, where it is pale 

 yellowish gray ; whitish below. 



Hah. Tolland, Colorado, altitude 8,900 ft. one (= type) 

 6 mm., near the Mountain Laboratory. 



This species seems to be related to H. veganus Ckll., from 

 which it may be distinguished by the longer face, and the close- 

 ly punctured mesonotum which is not opaque with fine lineola- 

 tions. 



Halictus lazulis sp. nov. 

 9 . — Length about six (6) mm. Much like H. pruinosiformis Crawf. 

 in general contour, rich peacock blue throughout. Face verj^ slightly 

 longer than broad ; opaque, the punctures moderately coarse and very 

 close; the small tubercle beneath the eye and those at the outer cor- 

 ners of the clypeus well developed ; clypeus produced, so that three- 

 fourths of it lies belo\v the lower margin of the eyes ; color on the 

 under side of the flagellum pronounced. Mesothorax opaque, rather 

 coarsely and very closely punctured ; median groove of the disc dis- 

 tinct, parapsidal grooves poorly developed. Metathorax with a low. 

 narrow rim. indented at the middle, around the comparatively broad 

 basal area ; basal area w-ith a middle ridge decidedly pronounced, the 

 plicae just on either side of this central one irregular and very weak, 

 but becoming more distinct laterally. Tegulse testaceous. Wings am- 

 ber hyaline ; stigma pale testaceous, the nervures rich reddish brown 

 to testaceous. Legs black to piceous : inner spur of the hind tai si with 

 three large and one small clavate teeth. Abdomen not stout, acutely 

 pointed behind ; very shin}-, fineh- punctured and openly lineolated dor- 

 sally : ventral side and narrow apical margins of each segment, above, 

 dark testaceous ; segments 4 and 5. and sides of segment 3. with rather 

 dense, short, closely appressed. pale greyish hairs. Pubescence very 

 scant except on the legs and abdomen ; pale grey tinged with buffy 

 above, more whitish below. 



Hab. Florissant, Colorado, one nearly 6 mm. on sand. Tune 

 14, 1907 (S. A. Rohwer) ; one about 6 mm. long at flowers of 

 Argentina anserina (L.), June 23. 1907. (S. A. Rohwer). 



This species looks more like H. prninosiforuiis Crawf. than 

 any other, but is easily distinguished by its amber wings, close- 

 ly punctured disc of the mesothorax, and dark blue color. 



