90 PROCEEDINGS OF THE NATIONAL MUSEUM vol. i04 



Pygidium moderately coarsely and riigosely punctured, pubescence 

 somewhat erect. 



Ventral surface black. Prosternum coarsely and closely punctured, 

 broadened posteriorly with apex rounded. Metasternum with punc- 

 tures less coarse, about equal to eye facets, separated by iK diameters, 

 surface between almost smooth; triangularly flattened in posterior 

 two-thu-ds, and with a small longitudinal central area unpunctured. 

 Abdomen with first sternite puuctiu-ed as metasternum, the second to 

 the fifth more finely and closely punctured, the areas between reticu- 

 late. The caudal margmal line of the hind coxal cavity follows 

 closely the hind edge of the latter almost to its outer end where it 

 curves abruptly backwards. The last sternite without secondary 

 sexual characters. 



Legs unicolorous black except segments 1-4 of all tai-si brown. 

 Anterior tibiae (fig. 76,/) slightly broadened towards the apex, with 

 outer edge finel}^, not quite evenly, serrate from the basal third, very 

 smiilar except in color to those of M. seminulum LeConte. Inter- 

 mediate and hind tibiae scarcely broader, the former widest at the 

 middle, the latter at the apical tliird, the outer edge rounded and 

 obliquely truncate at the apex and furnished with a row of fine close- 

 set setae. Inner edge of all tibiae straight. Tarsi narrow, the 

 anterior nearly twice as broad as the others; last segment a little 

 shorter than the first four together, claws simple. 



Genitalia as in figure lQ,a-d. Median lobe parallel-sided, simply 

 roimded at the apex, tegmen slightly narrowed to its rounded apex, 

 with narrow linear excision. 



Female: Externally similar to the male except front tibiae narrower, 

 more parallel-sided, front tarsi only 1^ times as broad as the others, 

 and metasternum not flattened. 



Genitalia as in figure 76,e. Ovipositor with apex acute, and with a 

 sclerotized spicule running backwards from the central point in the 

 ventral membrane as in M. seminulum. Styli somewhat elongate. 



Type: cf , CAS, and paratype, USNM 61625, Duparquet, Quebec, 

 Canada, June 18, 1938, G. Stace Smith. 



Paratypes: Canada: Quebec Province: 3, including 2 99, with 

 same data as type, and 15 taken by the same collector in the same 

 district at various dates in June (except one on August 2) between 

 1934 and 1943, one of these on Solidago, one on Fragaria, two on 

 Epilobium, others in lake-drift and on stones and plants beside the 

 lake. Alberta: Edmonton, 4, June 1910 and July 1919, F. S. Carr. 

 British Columbia: Stanley, 1, July 22, 1931, K. Graham; Beaton 

 River, 15 miles northwest of, 1, by sweeping, June 8, 1950, P. Bubt- 

 soff. Yukon: Dawson, 5, in USNM, June 1924, H. C. Fall. 



Alaska: Mount McKinley National Park, 72, in USNM, June 1931, 



