224 
Psyche 
[October 
ON THE ANT-GENUS CHRYSAPACE CRAWLEY. 
By William Morton Wheeler. 
Bussey Institution, Harvard University. 
Very recently Mr. W. C. Crawley has described a beautifully 
sculptured Ponerine ant from Sumatra as Chrysapace jacohsoni 
gen. et sp. nov. (Ann. Mag. Nat. Hist. (9) 13, 1924, p. 380). 
Among a lot of Formicidse generously sent me by Dr. K. W. 
Dammerman of the Buitenzorg Museum I find a specimen of 
this same insect, which was taken by Karny at Wai Lima, Lam- 
pong, Southern Sumatra, Nov. 12, 1921. It agrees in all respects 
with Crawley’s description and figure and awaited description 
in my collection under the label ‘‘Cerapachys mirandus sp. nov.” 
Crawley’s description of the sculpture is somewhat incomplete. 
In my specimen, which like his possesses three small, closely ap- 
proximated ocelli and is therefore apparently an ergatomorphic 
female, the ventral surface of the post-petiole is very regularly, 
transversely costate and the sternites of the second, third and 
fourth gastric segments, which are exposed, have their basal 
surfaces developed as very finely striated stridulatory organs 
and their apical borders pitted, or cribrate. 
Crawley calls attention to the affinities of this insect with 
Cerapachys F. Smith and Phyracaces Emery but decides to make 
it the type of a distinct genus. In my opinion the matter is not 
quite so simple. In the Ponerinae of the “Genera Insectorum” 
(1911) Emery recognized Cerapachys and Phyracaces as indepen- 
dent genera, the differences being that in the former the worker 
and female have the terminal antennal joint enlarged to form a 
distinct club and the petiole and postpetiole non-marginate on 
the sides, whereas, in the latter the terminal antennal joint is 
not enlarged to form a club but tapers to a blunt point and the 
sides of the petiole and sometimes also of the postpetiole are 
marginate. Crawley’s genus is clearly intermediate in that 
the body is that of a Cerapachys s. str. while the antennae are 
those of a Phyracaces. The peculiar sculpture cannot be regarded 
as a generic character and the narrowness of the petiole and 
