78 The Ottawa Naturalist. U^'^^y 



Family XXXVIL— Tiphiidae. 



81. Tiphia inornata, Say. A large black wasp which is not 



uncommon. Females are about two-thirds of an inch long, but 

 the males are much smaller. It is parasitic upon the larvae of 

 June-beetles (Lachnosterna) known as "white grubs," and its 

 parchment-like cocoon, an inch long, may be found sometimes 

 in the ground infested by these grubs. Six females, nine males. 



82. Tiphia tarda. Say. This is a much smaller species and 



apparently rare, as I have only taken one female (upon a pine 

 tree) and one male. Mr. Guignard also sent a male to Provancher. 



Family XL, — Thynnidae. 



Subfamily II. — MethocincB. 



8.3. Met hoc a bicolor, Say. This insect looks like a large slender 

 reddish ant. Two females, of which one was taken 8th Jub-, 

 1887, and the other was received from Dr. Fletcher. 



§^. Met h oca stygia. Say. This is a larger, winged, entirely 

 black insect, probably the male of the preceding species, though 

 differing so greatly in appearance. One male taken on 22nd 

 July. 



Family XL I. — Myrmosidae. 



Subfamily II. — Myrmosince. 



8.^. M y r m o s a u n i c o 1 o r. Say. A rugose, rather pubescent black- 

 insect which is considered to be the male of M. thoracica, Blake, 

 which has not yet been taken here. Four males, June to August. 



Family XLIL— Multillidae. 



Subfamily I . — MultillincB. 



86. Pseudomethoca canadensis, Blake. The females of 



this species are moderately abundant, and are found running 

 about on the ground on sandy soils where grass and other vege- 

 tation is scanty. They resemble stout, reddish ants, with bands 

 of pubescence on the abdomen. The winged males are black and 

 slenderer, and are the Photopsis Crcssoni of Fox, by whom the 

 species was determined for me. Twelve females, from May to 

 September, and three males in August. 



87. Photopsis canadensis, Prov. This species was described 



from a male contributed bv me from Ottawa, but has not occurred 

 again. It differs from the preceding species in having vellow 

 legs. 



