158 THYNNIDiE. 



THYNNIDiE, Erichson. 



THYNNUS. 



Thynnus, Fabr. Syst. Ent. 360 (males only). 



Myrmecodes, Latr. Nouv. Diet. d'Hist. Nat. xx. 2nd ed. (females). 



Thynnoides, Guer. Voy. Cog. Zool. ii. 232. 



Agriomyia, Guer. Voy. Coq. Zool. ii. 218. 



Catocheilns, Guer. Mag. de Zool (1842). 



1. Thynnus penetratus. 



Male. Length 3| lines. — Black ; the thorax and abdomen with 

 white maculae, the legs ferruginous. The anterior margin of the 

 clypeus, a narrow line up the inner margin of the eyes as high 

 as the antennas, a spot above each of the latter, and a spot at 

 the base of the mandibles white ; two small obscure rufous spots 

 at the margin of the vertex. The margins of the prothorax, the 

 tegulae, an abbreviated narrow line on the mesothorax, and a 

 similar line on the scutellum yellowish white; wings hyaline and 

 iridescent, the nervures ferruginous ; the coxae and trochanters 

 black. The basal segment of the abdomen with a central longi- 

 tudinal impression ; the first and three following segments with an 

 oblique short narrow white line at their extreme lateral margins ; 

 beneath, smooth and shining, the second, third, and fourth seg- 

 ments with a minute white spot laterally. 



Hah. Hunter River. 



2. Thynnus vastator. 



Male. Length 9 lines. — Head, thorax, legs, and extreme base of 

 the abdomen black ; the rest of the abdomen ferruginous. The 

 head and thorax with hoary pubescence, thin above, but much 

 more dense on the sides and beneath, and longest on the meta- 

 thorax and extreme base of the abdomen ; the clypeus, inner orbits 

 of the eyes as high as the antennas, and the mandibles yellow ; the 

 outer margin of the tegulse yellow ; wings subhyaline, a fuscous 

 cloud in the marginal cell ; the anterior femora and tarsi pale fer- 

 ruginous beneath. Abdomen not very closely or strongly punc- 

 tured, ' the apical segment rugose ; the apical ventral segment 

 triangular, and with a curved spine at the apex. 



Female. Length 5 lines. — Black ; the base of the mandibles, the 

 flagellum, apex of the scape, and the head anteriorly pale rufo- 



