172 
and the upper-surface of the latter less conspicuously notched 
at the sides, legs unarmed and middle femora no stouter than 
the others. The strongly-inflated middle femora of the male 
associates the species with tumidus in my table, but the two 
species are otherwise very dissimilar. 
ARTICERUS CONSTRICTIVENTRIS, Lea. 
Specimens of this species have recently been taken by 
Mr. R. J. Burton in South Australia (Murray River) and by 
Mr. W. W. Froggatt in New South Wales (Hay). The male, 
hitherto unknown, differs from the female in having the 
the middle, the convexity abruptly declivous posteriorly, and 
marked at its summit by a short process that is almost con- 
ARTICERUS PASCOEUS, Sharp. : 
Mr. E. F. du Boulay has taken several specimens of this 
species in ants' nest at Beverley (Western Australia). In my 
table the male is noted as having ''front tibiae conspicuously 
armed at apex." This is the case when both tibiae and tarsi 
may be seen clearly, but when the tarsi are pressed close to 
the apical tooth the latter might easily be mistaken for the 
former. Mr. Clark also took a specimen from the nest of à 
species of Cremastogaster near the Swan River. 
Specimens taken by Mr. F. P. Spry at Coburg and by p 
H. W. Davey at Ararat (both in Victoria) differ from ii 
clothing in general has also a more sericeous appearance 
I ean find no positive characters of the legs tha 
. Warrant their specific separation. 
