THE CANADIAN ENTOMOLOGIST. 243 



i $ , May 22, 1892. This may prove to be a variety of Tenthredo 

 ruficoxa, Prov. 

 Lyda olymftia, sp. nov. 



Ferruginous, shining; segments 10-24 'of antennae, spots at base of 

 antennae and narrow line between, beneath the ocelli, prothorax, meta- 

 thorax above and on sides, basal plates, the sutures of the venter, and 

 the apex of the abdomen, black ; cheeks, clypeus, interior orbits and 

 between the antennae, yellowish ; antennas twenty-four-jointed, first and 

 third segments subequal, third segment three times as long as fourth ; 

 posterior femora infuscated at base, otherwise the legs entirely ferruginous ; 

 front tibia with a single side spur ; wings yellowish-hyaline, veins yellow- 

 ish, stigma darker at base, third submarginal cell broader and slightly 

 longer than second, second branchial cell without cross-nervure ; hind 

 wings with apparently tnree closed cells. Length, 14 mm. 



1 £ , June n, 1892. This may be bucephala, Cress. 



Urocerid.«. 

 Oryssus occidentalism Cress. 



1 $ j the head is wanting, but the specimen without much doubt 

 belongs to this species. The two basal abdominal segments are black. 

 Urocerus albicomis, Fabr. 



1 Female. 

 Urocerus apicalis, Kirby. 



1 £ . The last dorsal abdominal segment is flattened. 

 Urocerus Behrensii, Cres. 



1 V i probably belongs here, the wings are entirely fuscous, the apex 

 of the antennae and all the tarsi are yellow. 

 Urocerus flavipennis, Kirby. 



3 $ $ . One from the Skokomish River, Aug. 7. Only one specimen 

 has the spots on the side of the abdomen, another has the antennae en 

 tirely yellow. 

 Urocerus indecisus, sp. nov. 



Antennae, head, thorax, basal plates, first and apex of the last abdo- 

 minal segment, a band each side below, and all the legs except the two 

 apicsal segments of the tarsi, black ; the remainder of the abdomen and 

 tarsi brown; antennae twenty-two-jointed; wings slightly fuscous, the 

 veins black, the second transverse cubital vein with a stump of a vein on 

 the inner side; cornus long, suddenly narrowed at apex, apex with several 

 teeth. Length, 16 mm. ; alar expanse, 26 mm. 1 £ . 



