32 
their molested paper nests with impressionable vigor. This home- 
defending instinct is also well developed in social bees and many 
ants. 
DESCRIPTIONS: OF NEW SPECIES, INCL@DING-ONE 
SPECIES: BROMTORMOSs: 
THYNNIDAE. 
Methoca. 
The six species of this genus taken on the Island of Luzon, 
P. I., as well as the single specimen from Formosa, while differ- 
ing from each other, at least in the female sex, by well-marked 
characters—as body proportions and sculpture—all agree in be- 
longing to quite another section than those of ‘temperate North 


America, Europe, and even 
as far as studied—of South A frica.* 
The following are the more marked differences between these 
two groups: 
THE PHILIPPINES AND 
FORMOSA. 
FROM 
o Philippines. 
Compound eyes proportion- 
ately larger and closer together ; 
ocelli in a more elevated, some- 
times an equilateral triangle; 
head shorter or less gibbous 
behind eyes; proportions of 
thorax more slender; no en- 
closed area at apex of propo- 
deum (except in fimbricornis). 
@ Philippines and Formosa. 
Compound eyes proportion- 
ately much larger; scutum of 
thorax reduced to a flattened or 
depressed area. 
FroM TEMPERATE NorTH 
AMERICA, EUROPE AND 
SOUTH AFRICA, 
¢ Temperate North America 
and Europe. 
Compound eyes proportion- 
ately smaller and more widely 
separated ; ocelli in a rather low 
triangle; head longer or more 
gibbous behind eyes; thorax 
stouter ; enclosed area at top of 
propodeum = 3 United States 
species. 
2 Temperate North Amer- 
_tca, Europe and South Africa. 
Compound eyes proportion- 
ately smaller and more widely 
separated; scutum convex and 
better developed. 
