568 DR. R. C. L. PERKINS ON THE 
oblique elevatum, elevatione summa media nunquam antice pro- 
ducta aut tuberculiformi. Propodeum (excepto P. picteti, cujus 
propodeum nigrum est, abdominis segmento primo rufo, postice 
pallide-marginato) colore signatum. 
There is no absolute discontinuity between the two sections, 
and one or two species I have placed in both tables. For the 
most part, however, the insects of either group are separable at 
a glance by the characters above given, and since the one or 
two dubious forms are included in both tables, I do not think 
there can be the least difficulty in placing any of the known 
forms. 
It is clearly the small size of the basal segment that gives the 
species in the second division their characteristic superficial 
appearance, and by this also their resemblance to some of the 
small Australian species of /caria is made much more perfect. 
Ali species that have not the above characters are necessarily 
referable to the Divisio prima. 
Divisio prima. 
Thorax, pronoto excepto, semper totus niger ; abdominis seg- 
mentum basale aut totum nigrum, aut linea aut fascia 
subabbreviata, hand ad angulos ipsos laterales extensa, sed 
ante hos evanescente, decoratum. 
(Clypeus semper emarginatus, et abdominis segmentum 
2 dorsale basim yersus haud conspicue convexim 
elevabum))...2%os-aeae wh atesiaecms pocaces toe ea eda oe eee eee 1 
Thorax spe aliter decoratus ; segmentum abdominis basale 
nunquam totum nigrum, sed fascia apicali integra, aut non- 
nullis in speciebus ex majore parte colore ornatum ............ 16 
1. Ale anteriores tot, aut fere totw, nigricantes aut profunde 
infumatz et conspicue ubique cruleo-nitentes; clypeus 
utrinque carina longa, bene exstante, ad aut post medium 
extensa, haud munitus. 
(Abdominis segmentum primum totum nigrum) ............ 2 
Alz anteriores in A. wnifasciato Sm. solo ubique violaceo- 
nitentes, quo in casu carinis longis, post medium extensis, 
Glypeusestprseditus, 136: 2ie tac as on une eit ee eee oe ee 4 
2. Abdominis segmentum 2 rufo-brunneum aut brunneo-auranti- 
acum, triangulo elongato, nigro, mediano, a basi post 
medium segmentum extenso, ornatum ............... saussuret, Sp. Nn. 
Abdominis segmentum 2 nigrum, fascia apicali flava, rufescente, 
aut aurantiaca, haud basim suam utrinque attingente, 
GUI HULA ee fe gae toe aca ONCE er eters MeCN CP OE he 3 
3. Femora, trochanteres et tibie nigra; fascia segmenti 2 ab- ~ 
dominalis antice emargimata ..................0..00.00s infernalis Sauss. 
Femora, trochanteres et tibie rufescentia; fascia segmenti 
2 abdominalis angusta, perpaullo utrinque latior... rufipes, sp. n. 
4, Clypeus fortissime emarginatus, emarginatione, ac semicirculus, 
zeque profunda, aut etiam hoc profundiore ..................... 5 
Clypeus haud profundissime emarginatus, emarginatione arcum, 
Semi(cireul OMMINOLeMestOrmanle eee teee eee eee eee aan eee a 
5. Ale anteriores et posteriores fere squaliter profunde in- 
fuscatze (parte costali nigriore); abdominis segmentum 
2 totum rufo-brunneum, aut brunneo-aurantiacum, margine 
postico primi angustissime, in parte media, cum secundo 
CONCOLOLE Brena in meee Se ene yas See eae Fraternus Sauss. 
