NEW SPECIES OF HYMENOPTERA. 37 



medial nervures strong, piceous, remaining veins weaker, interrupted in 

 places ; second and third submarginals subequal, second narrowed to- 

 wards marginal cell, third subquadrate. 



Female. Differs from male as follows : Length, 8*4 mm. Antennae 

 t\venty-three-jointed. Second abdominal segment only with a small yellow 

 posterio lateral spot. Abdomen without the secondary sexual characters 

 of the male, shaped much as in Nomada, with four genital filaments, the 

 outer pair of which are fimbriate. Four posterior tibiae with only a basal 

 yellow band, the hind ones with only slight indications of the striping. 

 The second submarginaj is longer than the third and subquadrate. 



The two specimens were taken at Woods Holl, Mass., during 

 the latter part of July. They had the peculiar habit, noticed in 

 canadensis by Dr. Geo. W. Taylor, of alighting on the leaves of 

 low trees. 



The stripes of the four anterior tibiae show a twisting from the 

 knee towards the front. In the male there is also a small basal 

 stripe almost contiguous to the anterior side of the stripe on the 

 hind tibiae. 



Inasmuch as Mr. Shuckard's three-line description of the 

 color markings of pullatus can be applied with quite as much 

 certainty to Oxybclns quadrinotatus or even to Eristalis tcnax, it 

 seems advisable at least to reclescribe the present form under the 

 name given. Mr. Wm. H. Ashmead writes that he has a speci- 

 men of this rare wasp from Minnesota, which in consideration of 

 the type-locality, North Carolina, shows a wide distribution for 

 this species. The differences given in the table between pulla- 

 tus and Jwllensis are not positively stated. The following are the 

 North American species of Trigonalys from Mexico northwards. 



pullatus Schuckard, 1841, N. Car., N. J., 9.5 mm. $ 



costalis Cresson, 1867. Mass., 9. " $ 



pulchellus Cresson, 1867, W.Virginia, 8.8 " $ 



nevadensis Cresson, 1879, Nevada, 8.8 " ^ , 9 



canaJensis Harrington, 1896, Victoria B.C. 10.5 " 9 



canadensis Harrington, 1898, Gabriola Is., B.C. 11.4 " g 



sulcatus Davis, 1&97, New Jersey, 7. " $ 



hollensis n. var., 1900, Mass., II. " $ 



8.5 " 9 

 PARNOPES. 



In 1874 Mr. F. Smith published the description of Parnopes 

 clirysoprasina from North Carolina. Since that time no one has 

 found this insect, though the fact that the species of this genus 



