OF CEBAM, CELEBES, TEENATE, AND GILOLO. 



51 



Female. Length 4 lines. Rufo-ferruginous ; the head black, the abdo- 

 men with three black fasciae, very smooth and shining ; the mandibles, 

 clypeus, and antennas ferruginous. (PL I. fig. 5. $ .) 



Hab. Celebes (Tondano). 



This very beautiful insect may probably be a very large, highly coloured 

 form of M. insularis, described in a previous paper ; but not having any 

 intermediate in size, I have thought it advisable to describe it as a distinct 

 species. 



Fam. THYNNIDiE, JErich. 

 Gen. Thynnus. 



1. Thynnus ATRA.TUS. T. niger, punctulatus ; alis anticis fusco-nigris, 

 apice hyalinis, posticis hyalinis, basi late fusco-nigris. 



Female. Length 12 lines. Black and closely punctured; the head and 

 thorax slightly shining, the thorax very shining, and not so strongly 

 and closely punctured as the thorax; the anterior margin of the 

 clypeus widely and slightly emarginate. The wings very dark brown, 

 shining, and with their apical margins, and the posterior margin of 

 the hind wings hyaline ; the legs black with short cinereous pubes- 

 cence within. 



Hab. Gilolo. 



This fine species of Thynnus is of the same form, and about the same 

 size, as Guerin's T. Shuckardi ; it is the second species that has to my know- 

 ledge been captured in the Eastern Archipelago ; the first species was 

 described in the paper descriptive of the insects of Bachian, &c, published 

 in the supplement to the fifth volume of the 1 Proceedings.' 



2. Thynnus (Agriomyia) vagans. T. niger, capite thoraceque 

 flavo variegatus, abdominis segmentis maculis duabus flavis ; alis sub- 

 hyalinis. 



Male. Length 6^ lines. Black, the head and thorax subopake, the 

 abdomen shining; the mandibles, clypeus and a V-shaped mark above 

 yellow ; the base of the clypeus and an anchor-shaped mark in the 

 middle black. Thorax, the collar, posterior margin of the prothorax, 

 a spot on the tegulae, two beneath the wings, a minute one on the 

 mesothorax, three on the scutellum, and one on each side of the meta- 

 thorax yellow ; the anterior tibiae and the intermediate pair in front 

 ferruginous ; the wings subhyaline, the nervures black. The abdomen 

 has an oblong yellow spot at the sides of all the segments except the 

 two apical ones. 



Female. Length 4 lines. Apterous ; black, the head small, transverse 

 in front, much narrowed behind, with a deep longitudinal sulcation on 

 each side close to the margin of the eyes. The thorax narrow and 

 oblong. Abdomen oblong-ovate, very large, with four deep transverse 

 grooves on the second segment. (PI. I. fig. 1 <? , 2 $ .) 



Hab. Gilolo. 



4* 



