ICHNEUAFOXID-E. STILPXUS. 209 



thorax rather gibbous : scutelhim convex : abdomen depressed, very smooth, 

 and glossy, somewhat orbicnlate in the females, and as wide as the thorax ; 

 the basal segment linear, narrower than the remainder, its anterior portion 

 rather broader than the peduncle, which has 2 lateral tubercles placed 

 before the middle: ovipositor scarcely exserted : wings ample; cellule 5- 

 angular, the outer nervure wanting, and thus rendering the cellule open, 

 and from its hinder angle arises the mere rudiment of the lower nervure: 

 legs slender, short. 



This genus, which appears to be closely allied to Hemiteles, may 

 be instantly recognized from the other genera of this family by 

 having a 5-angled cellule, the outer nervure of which is wanting, so 

 as to render the cellule open ; the nervure of the inferior angle is 

 also wanting, so that the hinder portion of the hinder wing is nerve- 

 less. 



Sp. 1. deplanatus. Niger, f em oribus tibiisgue rufis. (Long. corp. l^ — 2 lin. ; 



Exp. Alar. 3—4 lin.) 

 St. deplanatus. Gravenhorst, i. 667.— Steph. Nomen. 2d edit. col. 137. 

 BMck : abdomen orbiculate-ovate, with the basal segment a little dilated 



towards the apex ; legs red, with the coxae and trochanters black ; wings 



hyaline, iridescent. 



Rare : taken near London, in June. 



Sp. 2. gagates. Niger, pedihusfulvis, coxis nigris, antennis basin versus rufis. 

 (Long. corp. \\—2 lin.; Exp. Alar. 3— 4 lin.) 



St. gagates. Gravenhorst, i. 667.— Steph. Nomen. 2d edit. col. 137. 



Black: palpi pale; antenns reddish at the base, with the basal joint generally 

 black above, reddish beneath ; thorax with 2 acute tubercles on the meta- 

 thorax ; abdomen lanceolate in the male, depressed and orbiculate-ovate in 

 the female, with the ovipositor slightly exserted ; legs most slender in the 

 male, fulvous, 4 anterior coxa? sometimes entirely red, or red, with the base 

 black, or black, red beneath, rarely nearly quite black, posterior for the 

 most part black, red at the tip beneath, rarely black, or red, with the 

 extreme base black ; wings hyaline. 

 Also found in June near London, not uncommon. 



Sp. 3. Pavonise. Niger, pedibus et antennarum bast luteis. (Long. corp. If Im. ; 

 Exp. Alar. 3 lin.) 



Ich. Pavonise. Scopoli, No. 762.— St. Pavonise. Steph. Nomen. 2d edit. col. 137- 



Black : antennae with the basal joint red, the following black in the male, 

 testaceous in the female, and gradually becoming darker towards the apex, 

 which is black ; abdomen oblong-lanceolate in the male, nearly orbiculate 

 in the female ; ovipositor concealed ; legs slender, stoutest in the female, 

 reddish straw-colour ; the posterior in the male with the tarsi and apex of 



Mandibulata, Vol. VII., Oct. 31st, 1835. o 



