132 
is explained by Fabre for Tachytes and by the author in the case 
of Larra and Notogonidea. 
In the Philippines I found the genus Notogonidea (Sens lat) 
commonest and the best represented in species (9). Larra, Liris, 
Dicranorhina, Hyloliris (a peculiar sylvan genus described here as 
new), Lyroda, Tachytes, Tachysphex and Nitela were also rep- 
resented. 
It appears strange that while Lyroda subita Say of Pe aes 
America provisions her cells with little Nemobius crickets (Gryl- 
lidae), L. formosa Smith of the Philippines preys upon mature or 
ete erouse-locusts (Tettigidae), insects not closely related 
to crickets. 
Larra lusonensis Rohwer. 
Length 13 mm.; shining black; hind femora red, wings clear. 
I did not find this glossy little wasp common at Los Banos. 
It was sometimes seen on the leaves of honey-dewed bushes or 
else on the ground hunting her prey. A much rarer, somewhat 
larger, jet-black species is found in the neighboring forest. Our 
smaller species occurs as an adult throughout the year. 
There seems to be very little on record about the habits of the 
genus Larra. Fabre in his Nouveaux Souvenirs E ntomologiques 
xD speaks of watching L. anathema, a large European species, 
follow the superficial burrows of the mole cricket, and states that 
it probably attacks young specimens of this insect, as the mature 
ones are too large and powerful to handle. According to Hartman 
(05), in his paper on some Texas wasps, L. americana, also a 
large species, inhabiting North America, provisions the cells of 
her burrow with crickets, and I take it that he means ordinary 
field crickets or Grvyllus. 
It was some time before I discovered the nature of the prey of 
the little Philippine species. Late in 1916 I watched two females 
hunting. They proceeded along the ground at a rather slow 
gait, pausing now and then to examine some crack or hole where, 
I suppose, prey was suspected. In July of the following year I 
noticed a Larra digging into the surface burrows of a young mole 
cricket, probably Gryllotalpa africana. She excavated almost 
wholly by biting out the soil, and at times appeared quite excited. 
More satisfactory data were secured on July 30, when at 8:30 
a.m. I saw a wasp searching meadow ground. Soon she halted 
at a spot and there dug with vigor, backing out once or twice 
and again resuming her digging. In her immediate vicinity a 
young mole cricket, evidently made aware of the unhealthiness 
of the neighborhood, hastily issued from the ground and _ pro- 
