CERATOPOGON. 209 



and divided them into minor groups ; these characters are mostly 

 ujinoticed by Meigen and by Zetterstedt. Their delicate structure 

 is very easily injured, and I have not been able to ascertain clearly 

 that all the species here described are British insects ; but it is 

 most probable that they will prove to be so. 



1. pallidus, Winn. ! Linn. Ent. vi. 15. 1. pi. 3. f. 1 (1852). Mas 

 et Fcem. fusco-cinereus, pallide aureo-hirtus, palpis fuscis, thoracis late- 

 ribus albido-lineatis, pectore antico albo, halteribus fuscis basi albidis ; 

 Mas, antennarum fasciculis nigro-cinereis apice albicantibus, alls lim- 

 pidis albicantibus cano-hirtis, venis pallidis ad costam fuscescentibus, 

 pedibus albidis albo-hirtis ; Fcem. antennarum articulis primo ad octavura 

 albidis longiovatis, nono ad decimum tertium pallide fuscescentibus, alls 

 limpidis nigrp-cinereo-hirtis, pedibus flavescentibus fiavido-hirtis. Long. 

 1 ; alar. 2 lin. 



Male and Fern. Brownish-cinereous, clothed with pale gilded yellow 

 hairs. Palpi brown. Thorax with a whitish stripe on each side. Pectus 

 white in front. Halteres brown, whitish towards the base. Male. 

 Pencils of the antennae blackish-cinereous, with whitish reflections at 

 the tips. Wings ichitish-limpid, clothed with hoary hairs ; veins pale, 

 brownish towards the costa. Legs whitish, clothed with white hairs. 

 Fern. Joints of the antenna? from the first to the eighth whitish, 

 elongate-oval, from the ninth to the thirteenth pale brown. Wings 

 limpid, with blackish- grey hairs. Legs yellowish, with yellowish 

 hairs. 



(E.?) 



2. regulus, Winn. ! Linn. Ent. vi. 16. 2. pi. 3. f. 2 (1852). Mas 

 et Fcem. niger, aureo-flavo-hirtus nigroque setosus, pectoris lateribus an- 

 ticis albo-unipunctatis, halteribus niveis, abdomine flavo-cinereo-hirto, 

 genubus argenteo-punctatis, tibiis tarsisque piceis ; Mas, antennarum 

 fasciculis apice albicantibus, alis albis albo-hirtis, costa nigro-setosa ; 

 Fcem. alis limpidis nigro-cinereo-hirtis, femoribus tibiisque posticis non- 

 nihil incrassatis. Long. || ; alar. 1-j-lf lin. 



Male and Fern. Black, clothed with gilded yellow hairs and with black 

 bristles. Palpi black. Tips of the antennae with whitish reflections. 

 Pectus in front of the wings with a white dot on each side. Halteres 

 snow-white. Abdomen black or blackish-brown, clothed with long 

 yellowish-grey hairs. Knees with a silvery dot. Tibiae and tarsi 

 piceous. Male. Plumes of the antennae with whitish tips. Wings 

 white, clothed with white hairs ; costa with black bristles. Fern. Wings 

 limpid, with blackish-grey hairs. Hind femora and hind tibiae some- 

 what thickened. 



(E.?) 



3. niger, Winn. ! Linn. Ent. vi. 17. 3. pi. 3. f. 3 (1852). Mas et 

 Fcem. niger, nigro-hirtiis, halteribus albis petiolo nonnunquam fusces- 

 cente, abdomine cano-piloso nonnunquam nigro-fusco, pedibus piceis, 



VOL. iv. 2 E 



