76 The Ottawa Naturalist. [July 



Family XXXI.— Chrysididae. 



Subfamily II. — ChrysidincB. 



49. Tetrachrysis Norton i, Aaron. Four specimens. 



50. Tetrachrysis coerulans, Fabr. One of our commonest 



species and varies considerably in size and colour; 12 specimens. 



51. Tetrachrysis nitidula, Fabr. Closely resembles the 



preceding species, and some individuals are difficult to separate. 

 Fourteen specimens, of which one was bred from the cells of an 

 O d y n e r u s. 



52. Tetrachrysis a u rich alee a, Prov. This species should 



perhaps be placed in Dichrysis, as Aaron placed it in his 

 group, distinguished by having two apical teeth. Provancher, 

 however, in describing the species states that the apical border 

 of the abdomen is cut into four teeth. The lateral ones are not 

 prominent, being rather angles than teeth. This is our most 

 beautiful species and our only real "ruby-tail." The abdomen 

 of my only specimen (a female) is of a golden bronze, with ruby 

 reflections. The male has been taken by Mr. Guignard. 



53. Trichrysisparvula, Fabr. Four specimens, of which two 



were reared from the clay-built cells of Pelopa'tis cementarius, 

 Drury, our cominon mud-dauber wasp. 



54. Gonochrysis perpulchra. Cress. This is a somewhat 



more robust and greener species than the preceding forms, and 

 the apex of abdomen is notched instead of dentate. Nine 

 specimens. 



55. Chrysogona verticalis, Cress. This is a small insect 



which seems to be abundant; 9 specimens. 



56. Chrysogona hilaris, Dahlb. Provancher credits me with 



having sent to him a female of this species, which differs from 

 verticalis chiefly in the absence of a carina above the frontal 

 basin. 



Subfamily I II. — Hcdychrince. 

 5 7. H o 1 o p y g a v e n t r a 1 i s, Say. Five specimens. 



58. H e d y c h r u m v i o 1 a c e u m, Brulle. Three specimens. This 



species closely resembles the preceding in its compact, robust 

 shape, but is smaller, and is easily separated by the differently 

 toothed claws. 



Subfamily IV. — EliDiipiucc. 



59. N o t o z u s V i r i d i c y a n e u s, Norton. Two specimens; one 



taken 6th June, the other received from Mr. Guignard, and 

 determined by Provancher. 



60. Notozus margin at us, Patton. A smaller species which 



also seems rare. Three specimens, of which one was received 

 from Mr. Guignard. Determinations by Provancher and Brid- 

 well . 



61. Notozus nitidus, Aaron. Provancher records this species 



from Ottawa. The types were from Montana and California. 



62. Elampus speculum. Say. Also rare, only two specimens, 



captured 14th and 30th June. 



63. Elampus Cressoni, Aaron. Provancher credits Ottawa 



with this closely allied species. 



