1908] Fauna Ottawaexsis. 75 



31. Vcspa b o r e a 1 i s, Kirby. The markings of this wasp are 



similar to those of the preceding species but are white instead 

 of yellow. It is probably a diinorphic form as Dr. Fletcher 

 found both species inhabiting a nest attached to his house at 

 the Experimental Farm, and also in a nest at Meach Lake; 1 

 female, 5 males. 



32. V e s p a m a c u 1 a t a, Linn. This is our largest wasp and is the 



so-called "white-faced hornet." In Harper (January, 1908) there 

 is an interesting illustrated article by Dr. McCook on the nest- 

 building of this species; 1 male and 5 females. 



33. Vespa arenaria, Fabr. {marginata, Kirby) is also black 



and white, but is easily recognized by its smaller size and paler 

 legs. It seems to be rare here; 2 females and 2 workers. 



34. Vespa germanica, Fabr. This species closely resembles 



No. 30 in its conspicuous black and yellow livery, but it builds 

 its nest under ground and is not so common; 2 females, 1 worker. 



35. Polistespallipes, St. Farg. This is a common black and 



yellow wasp which is longer and slenderer than the species of 

 Vespa. In the autumn it may be often found sunning itself 

 on the walls of houses or on fences. .Vest usually found under 

 stones; 3 females, 4 workers, 1 male. 



Family XXIX. — Eumenidae. 



36. Eumenes globulosus, Sauss. A coinmon and easily 



recognized species; 4 females, 6 males. 



37. Odynerus pennsylvanicus, Sauss. This small species 



appears to be common; 3 females, 8 males. 



38. Odynerus leucomelas, Sauss. One of our largest white- 



banded species and abundant; 5 females and 12 males. 



39. Odynerus foraminatus, Sauss. Closely resembles the 



preceding species but the markings are yellow; 4 females, 7 males. 



40. Odynerus sp. One small female determined by Mr. Bridwell 



as near mohicanus, Sauss. It may be only a variety of No. 37. 



41. Odynerus capra, Sauss. One of our largest forms with 



bright yellow markings; 5 females, 6 males. 



42. Odynerus a 1 b o p h a 1 e r a t u s, Sauss. A smaller species 



with white markings, which is one of our commonest forms; 7 

 females, 1 1 males. 



43. Odynerus catskillensis, Sauss. Resembles very closely 



the preceding but the markings are yellow; 13 females, 9 males. 

 One of the females has attached a female of the parasite Xenos. 



44. Odynerus tigris, Sauss. This is a sinall species of which 



I have only 4 males. 



45. Odynerus philadelphi ae, Sauss. A medium sized slender 



species which is not common; 5 females and 3 males. 



46. Odynerus debilis, Sauss. Our smallest and slenderest 



species, and one of the commonest; 7 females, 15 males. 



47. Odynerus Walshianus, Sauss. This seems to be a rare 



species as only one female has been taken. 



48. Odynerus albomarginatus, Sauss. Differs from the 



three preceding species in having white markings; 2 inales only 

 taken. 



