GASTEEUPTION.— EVANIA. 425 



coarsely, transversely rugosely striated, the lateral lobes not so strongly as the middle 

 ones; scutellum strongly aciculated ; pleurae shagreened below and, as well as the 

 sternum, thickly covered with a silvery pubescence; metanotum almost shining, 

 irregularly transversely roughened. Abdomen opaque, shagreened, the basal three 

 segments on the lower side testaceous. Hind coxae finely but obscurely striated 

 laterally ; hind tibiae considerably thickened, opaque, shagreened ; spurs testaceous ; 

 metatarsus longer than all the other joints united. 



The male has the tips of the antennae rufous, and the sculpture on the pleurae (espe- 

 cially behind) much stronger. 



The base of the four anterior tarsi is broadly white ; all the tibiae are white at the 

 base ; the front tibiae incline to testaceous ; and the tegulae are testaceous. 



The colour of the legs varies, as does also the intensity of the sculpture on the thorax. 



EVANIA. 



Evania, Fabricius, Syst. Ent. p. 345 (1775). 



Hyptia, Illiger, in Rossi's Fauna Etrusca, ii. p. 81 (1807). 



Brachygaster, Stephens, 111. Brit. Ent. Mand. vii. p. 118 (1835). 



Upwards of 50 species of Evania have been described, from all parts of the globe, 

 and one or two appear to be cosmopolitan. So far as we know, the species are parasitic 

 on Blattidae. 



A. Radial and cubital nervures (except in E. nitida) complete, or the cubital nervure 

 faint from the second cubital cellule. Antenna? rather long, the joints elongated. 

 Hind legs very long. (Species 1-13.) 



i. Forks of the metasternal process diverging. (Species 1-3.) 



a. Face carinate in the centre and more indistinctly so laterally. Thorax in front 



rounded. (Species 1 and 2.) 



l. Evania tinctipennis. (Tab. XVII. figg. 16, 16 a-c, $ .) 



Nigra, facie et fronte lsevis, nitidis ; petiolo dimidio apicali coxisque posticis punctatis ; alis fere fumatis. $ . 

 Long. 11-12 milli'in . 



Eab. Costa Eica, Cache (Bogers) ; Panama, Volcan de Chiriqui 4000 to 6000 feet 

 (Champion). 



The lower part of the face, the pleurae, the metanotum, the apical three segments of 

 the abdomen above, and the third antennal joint are densely covered with a silvery- 

 white silky pile ; the legs are less densely covered, and the pile on them is darker ; the 

 pile on the other parts of the thorax is much shorter and fuscous ; the petiole has a 



biol. cente.-amee., Hymenopt., November 1887. 3 n 



