OCYPTERA. 9 



prabrackialis cubitali ante apicem conjuncta. Abdomen cylindricum, 



arcuatum, subtus recurvum. 



Body narrow, linear. Palpi very short Fourth and fifth joints of 

 the antennae distinct ; sixth bare. Prabrachial vein united to tlie cubital 

 at some distance from the tip of the latter. Abdomen cylindrical, arched ', 

 recurved beneath at the tip ; first segment long. 



a. Third joint of the antennae twice the length of the second. Sp. 1. 

 a a. Third joint of the antennae less than twice the length of the second. 

 Species 2. 



1. brassicaria, P. S. 1. 11. 443. 36 (1781) ; Gmel. ; Latr. ; Fal. ; 

 Meig. ; Mcq.; Desv. ; Curt. ! B.E. 629 ; Loew; Zett. cylindrica, D. G. 

 segnis, Pz. ; Schell. ; Schaeff. Nigra, capite argenteo, thorace cano 

 nigro-quadrivittato, alis cinereis dimidio antico basalt flavescente, abdo- 

 mine rufo vitta interrupta dorsali apiceque nigris. Long. 5 ; alar. 8 lin. 



Black. Head silvery-white. Frontalia deep black, slightly widen- 

 ing at each end. Epistoma pale yellow. Antennae reaching the epi- 

 stoma ; third joint almost fusiform ; sixth very stout towards the base, 

 near thrice the length of the fourth and fifth. Thorax hoary, with 

 four slender black stripes on the fore part. Wings grey, yellowish along 

 half the length beneath the costa ; praebrachial vein forming at its flexure 

 a well-defined hardly obtuse angle, which emits a very short appendage, 

 beyond this it is undulating, and joins the cubital vein at some distance 

 from the tip of the latter. Alulae white. Abdomen red, with a widely 

 interrupted black stripe, which is dilated and triangular at the base ; third 

 and following segments black. 



Bare. (E.) 



2. cylindrica, F. S. A. 313. 2 (1805); Meig.; Mcq.; Desv. ; 

 Winnertz; Loew; Zett. Nigra, capite argenteo, thoracis lateribus 

 anticis canis, alis cinereis antice subfuscis, abdomine segmentorum secundi 

 et tertii lateribus rufis. Long. 3-3^ ; alar. 5-6 lin. 



Black, shining. Head silvery-white. Frontalia deep black. An- 

 tennae almost reaching the epistoma; third joint fusiform. Thorax 

 hoary on each side in front. Wings grey, brownish along the fore 

 border ; praebnichial vein forming an obtuse angle, and emitting a very 

 short branch at its flexure, near which it is very slightly curved inward, 

 but has a more distinct outward curve near its junction with the cubital. 

 Alulae white. Second and third abdominal segments red, hind border of 

 the latter and a dorsal stripe black. 



Rare. In the collections of Mr. Desvignes and of the late Mr. 

 Stephens. (E.) 



VOL. II. 



