302 Professor Williston on the 



Chordonota. 



Gerstaecker, Linn. Ent., xi., 311, 1857. 



1. Chordonota leiophthalma, n. sp. 



^. Eyes bare, closely contiguous, the upper part with the 

 facets markedly enlarged, those of the lower half small, the two 

 sets separated by a distinct line. Occiput concave, wholly invisible 

 from the side. Ocellar triangle small, black ; frontal triangle 

 small, silvery, the silvery pubescence extending a little way along 

 the facial orbit. Antennae red, the upper margin and the distal 

 portion of the third joint black. Mesonotum black, with a strong 

 purple reflection, beneath the short, dense, black pubescence ; two 

 narrow, silvery, or light golden, pubescent stripes on each side, and 

 an indication of a fifth in the middle. Scutellum like the meso- 

 notum and with silvery pubescence near its margin. Pleurae black. 

 Abdomen shining metallic blue or purple, the fourth and fifth 

 segments each with a spot of silvery pubescence on each side. Legs 

 black, the metatarsi a little reddish. Wings tinged with blackish, 

 the stigma luteous. Length 7 mm. 



Two specimens. This species, structurally and in 

 appearance, resembles C. nigra, Willist., but will be at 

 once distinguished by tlie bare eyes, distinctly vittate 

 mesonotum, and shorter pile. 



Species Incertj^] Sedis. 



A small species, represented by a fragment only, 

 belonging among the Pachygastrinae, perhaps to Pachy- 

 gaster. 



TABANID^. 



Tabanus. 



Linne, Fauna Suecica, 1761. 

 1. Tahanus aids, n. sp. (PI. X., fig. 77, antenna.) 

 $ . Brown ; wings with brown spots ; upper angle of the third 

 antennal joint drawn out into a long process. Length 13-14 mm. 

 Eyes bare ; no ocellar tubercle. Front narrow, cinnamon- 

 brown ; callus very small, shining red. Antennae yellow, with 

 black hairs ; slender ; the upper process of the third joint drawn 

 out into a long process, the annulate portion slender, and curved. 

 Face of the colour of the front, bare. Palpi yellow, with black 

 hairs. Mesonotum cinnamon-brown, or darker brown, with two 



