> 44h 
XXII. Characters of a new Genus and Species of Chalci- 
dites. By F. Waker, F.L.S. 
[Read 2nd October, 1865. | 
Tue Hymenopterous insect here mentioned is from North 
Australia, and is in the possession of F. Smith, Esq., who has 
kindly allowed me to describe it. Its apparent resemblance to 
some of the ant tribe is very striking, and the purpose of this 
mimicry has been often noticed in recent publications. It seems 
to have most affinity to the Cleonymide ; but like some other 
exotic genera it has a peculiar structure, which distinguishes it 
from all the hitherto defined groups of Chalcidites. 
Genus Myrmecopsis. 
Mas.—Corpus robustum, apterum. Caput scabrum, sparse 
pubescens, transversum, thorace non angustius; facies 
transverse sulcata. Oculi magni. Ocelli tres. Mandibulz 
parve. Antennz flagelliformes, apud os inserta, thorace 
vix breviores ; articulus 1"° facie non brevior; 2% elongatus; 
5¥s 1m dimidio, 2° duplo longior; 4"% et sequentes breves; 
13" longé conicus, 12™° longior. Thorax scaber, sparse 
pubescens. Prothorax transversus, quadratus, bene deter- 
minatus ; latera marginata. Mesothorax brevissimus; scutum 
parapsidum suturis distinctis; scutellum scuto multo brevius. 
Metathorax quadratus, bene determinatus, mesothorace 
brevior, margine postico setoso aciculato bidentato. Petiolus 
brevissimus. Abdomen ellipticum, glabrum, convexum, apice 
setosum, thorace latius et multo brevius, segmento uno dorsali. 
Pedes robusti; tibize calcaribus parvis; tarsi subarcuati, 5- 
articulati; femora antica subincrassata. 
Male.—Body stout, with hardly any rudiments of wings. Head 
and thorax scabrous, thinly pubescent. Head fully as broad as 
the thorax ; face vertical, with transverse furrows. Eyes large, 
not prominent. Ocelli three, as usual. Mandibles small. Antenne 
nearly as long as the thorax, inserted close to the mouth, imcreas- 
ing in breadth from the Ist joint to the 7th, tapering thence to 
the tips; Ist joint or scape as long as the face; 2nd elongate; 3rd 
VOL, II, THIRD SERIES, PART VI.—FEB. 1866. EK 
