304 TIPTJLIDjE. 



petiole of the first externo-median vein is about as long as its branches.* 

 Halteres pale yellowish ; narrow hind edge of the abdominal segments 

 lighter grey ; vagina and valves shining-ferruginous, the latter very little 

 curved upwards and acuminate at the tips; coxse ferruginous-cine- 

 rascent; femora ferruginous, the tip dusky; tibiaB fusco-ferruginous, 

 darker at the tips ; tarsi fuscous. Very closely allied to some species 

 from the Arctic regions of North America." Hal. MSS. 

 Rare. (E.) 



c c. Axillary vein not curved abruptly to the hind border. 



" SECTION 24. 



51. lateralis, Mcq. H. N. D. ii. 653. 8 (1835); Meig.Jlavo-lim- 

 bata, Hal. manifesto, Walk. Atra, nitens, mesothorace et scutello 

 flavo-marginatis, pleuris flavo-maculatis, alis obscure hyalinis, halteri- 

 bus pallide fuscis, abdominis lateribus flavo-lineatis, pedibus nigrican- 

 tibus. Long. 2-|; alar. 5J lin. 



" Glossy black (or black-brown). Antennae blackish, sixteen-jointed. 

 Mesonotum and scutellum edged, pleura spotted with clear light yel- 

 low. Wings obscure hyaline; a very pale stigmatic cloud behind the 

 apex of the subcostal vein ; veins fuscous, pubescent, very finely towards 

 the tip, also the praefurca (common petiole of the radial and cubital 

 veins) ; membrane glabrous ; fork of the radial vein short, unconnected 

 with the subcostal ; anterior branch shorter than its petiole ; branches 

 of the first externo-medial vein longer than its petiole ; axillary vein 

 not sinuated, diverging widely from the anal, ending about half-way 

 between the anal angle and the end of the anal vein ; mediastinal vein 

 ending nearly opposite the first fourth or third of the anterior radial 

 areolet, and connected with the subcostal a little before this ; no discal 

 areolet; brachial nearly conterminous (Div. A, Meig). Halteres pale 

 brown. Abdomen with a narrow yellow lateral line; last segment 

 above and beneath with a narrow yellow edge behind. Legs nearly 

 black, rather slender, finely pubescent ; middle pair a little shorter than 

 the rest. Male. Antenna as long as the thorax. Forceps longer than 

 the adjoining segment ; outer arms with the first part thick, blackish ; 

 second one-half thinner, piceous, linear, truncated ; inner appendages 

 slender, palpiform. Fern. Antenna3 a little shorter than the thorax. 

 Tentacles slender, pointed, gently turned up, brown. This species dif- 

 fers much in the veining of the wings from the true Eriopterce, and 

 especially in the disposition of the radial forked vein." Hal. MSS. 



Not common. (E. I.) 



* The spot on the middle of the anterior radial areolet is sometimes half connected 

 with the transverse one on the end of the discal areolet, by an interiuedial dot on the 

 cubital vein forming a second (but interrupted) half band, so that the marking of the 

 wings may be described (beginning from the base) as two large anterior spots, two ab- 

 breviated sinuous transverse bands, the outer one interrupted, two small spots, one 

 on the fork of the first externo-medial vein, one on the tip of the first radial branch. 



