134 



U. S. NATIONAL MUSEUM BULLETIN 216 



October 9 and 10 at Robson, B. C.J and November 29 at Jemez 

 Springs, N. Mex. 



Rearing records are: 9, from Buprestis conjluens in Populus tremu- 

 loides, Vade, Calif., Feb. 4, 1916, H. E. Burke. 39, from Saperda 

 moesta in Populus trichocarpa, Riggins, Idaho, Apr. 6 to 8, 1914, 

 Josef Brunner. 9, from Saperda tulari, Clarksburg, Calif., "11-4-35." 

 9, from Saperda sp. in Populus tremuloides, North Cheyenne Canyon, 

 Colo., Geo. Hofer. cT, from Xylocrius agassizi in Ribes, Buckley, 

 Wash., Apr. 29, 1938, W. W. Baker. 29, from Xylocrius agassizi in 

 Ribes, Puyallup, Wash., May 1939, W. W. Baker. 



This subspecies occurs in the Canadian and Transition zones of 

 western North America. Adults occur from early spring to fall but 

 are scarce in the last half of summer. It has been reared from coleop- 

 terous borers in Popidus and Ribes. 



Figures 54, 55. — Localities: 54 (left), Dolichomitus messor sparsus; 55 (right), 



D. m. perlongus. 



8b. Dolichomitus messor perlongus (Cresson), new status, new combination 



Ephialtes perlongus Cresson, 1870, Trans. Amer. Ent. Soc, vol. 3, p. 143; d*. 



Type: d\ Massachusetts (Philadelphia). 

 Ephialtes gigas Walsh, 1873, Trans. Acad. Sci. St. Louis, vol. 3, p. 110; ?. New 



synonymy. Type: ?, Illinois? (destroyed in Chicago fire of 1871). 



Male: Face with rather small, dense punctures and dense hairs; 

 the first trochanter of front leg flat or a little concave; second tro- 

 chanter of front leg almost flat below; under side of front trochanters 

 and of basal third of front femur with very fine dense punctures from 

 which arise fine short hairs; outer side of middle coxa with a distinct 

 median swelling which is covered with fine punctures that are about 

 twice as dense as elsewhere on the coxa. 



Black. Clypeus mostly ferruginous; scape with a large pale yel- 

 lowish spot in front; palpi whitish, their basal segment brown; meso- 



