281-280 
282-283 
283-282 
284-1 
285-290 
286-287 
287-286 
288-289 
289-288 
290-285 
291-208 
292-293 
203-292 
204-295 
295-204 
296-297 
207-206 
208-291 
299-304 
300-301 
301-300 
302-303 
303-302 
304-209 
305-320 
New Species of Sierola, With Explanatory Notes. 69 
Head narrowing behind the eyes 
Punctuation of the head extremely fine, hairy 
clothing long and delicate, segments of 
the antenne as wide as long 
Punctuation of the head rather coarse, hairy 
clothing short and inconspicuous, seg- 
ments of the antenne considerably lon- 
ger than wide 
Head not extended in front of the eyes, an- 
terior margin transverse 
Large species, over 3 mms. in length 
Thick-set, head longer than wide, clypeus 
nearly flat, wings with yellowish brown 
pigmentation 
Not so 
Width between the eyes more than twice the 
length from eye to vertex, segments of 
the antenne throughout considerably 
longer than wide 
Width between the eyes less than twice the 
length from eye to vertex, segments of 
the antenne beyond the first funicle seg- 
ment as wide as or wider than long 
Smaller species, 3 mms. in length or less 
Species more or less flattened, without great 
thickness dorso-ventrally 
Depressed to an extreme degree, mandibles 
black 
Less strongly depressed, mandibles brown or 
flavous 
Head longer than wide by a half 
Head not much longer than wide 
Legs, antenne and mandibles flavous 
Legs, antenne and mandibles fuscous to 
black 
Species not dorso-ventrally flattened 
Slender species 
Thickly clothed with hair, mandibles black 
Hairy clothing short and _ inconspicuous, 
mandibles yellowish or reddish brown 
Head longer than wide by more than a half, 
mandibles reddish brown, the base not 
reaching the eye, gula longer than wide, 
propodeum rugulose 
Head longer than wide by less than a half, 
mandibles yellowish brown, the _ base 
touching the eye, gula no longer than 
wide, propodeum delicately sculptured 
Species not remarkably slender 
Brilliant, not at all dull 
[15 ] 
141. 
142. 
143. 
ISI. 
vetusta 
kalthiensis 
aucta 
breviceps 
bridwelli 
depressa 
philodoriae 
planiceps 
holomelaena 
hirticeps 
tenuiceps 
nitens 
