25. 

 PSEN EQUESTRIS. 



Order Hymenoptera. Fam. Larradac Lat.^ Leach. 

 Type of the Genus Trypoxylon atratum ¥ab. 



PsEN Lat., Jiir., Panz. Trypoxylon, Pelopaeus Fab. 



Antennce inserted near the centre of the face, chxvate, curved, 

 smooth, 12-jointed in the female, 13-jointed in the male 3 first 

 joint large, second small, terminal joint ovate. (1.) 

 Labrum exserted, transverse, subrotundate before, entire, ci- 

 liated. (2.) 



Mandibles slender, scarcely arcuated, unidentate internally. (3.) 

 Maxillce coriaceous, divided transversely, terminal process nearly 

 membranaceous, rounded and ciliated : Palpi elongated, un- 

 equal, G-jointed j first joint very small, third largest, sixth slen- 

 der. (4.) 



Mentum large, dilated in the centre, hairy {J>. a.), (the point to 

 which the maxilla is attached is shown at e.) : Palpi long, 4- 

 jointed, first joint long, second and third short, last robust, 

 ovate, (b.) 



Lip short, with the edges conniving internally, (c.) 

 Clypeus subrotundate, anterior margin elevated. Head transverse, as 

 broad as thorax, with a tubercle between the antennce. p]yes oval, 

 entire, remote. Ocelli 3, inserted on crown of head in a triangle. 

 Thorax short, nearly ovate. Scutellum narrow, small. Abdomen 

 ovate-conic, with an elongated, abrupt peduncle. Superior wings 

 with one marginal cell, not extending to the apex, and three perfect 

 submarginal cells, the middle one nearly trigonate, either receiving 

 one or two recurrent nerves. Inferior wings with two complete basal 

 cells. Legu rather small. Tihiis spined. Tarsi i)-jointed,Jirst joint 

 nearly as long as the three following, last terminated by simple claws 

 and pulvilli. (8. afore leg.) 



Equestris Fab. Syst. Piezatorum, p. 182. 7i. 6. 



Black : clypeus and face silvery with hair, shining ; first seg- 

 ment of abdomen rufous, with a black spot at its base ; second 

 entirely, and third partly, rufous. Wings hyaline, iridescent. 

 Antennae rufous beneath. Thighs and coxae black. Tibiae and 

 tarsi pale ferruginous, the former annulated with black. 



In the Cabinets of Mr. Haworth and the Author. 



This pretty little species I took flying near Lyndliurst in tlie 

 New Forest the end of August 1822. Mr. Haworth has also 

 taken it in the neighbourhood of London. My specimens per- 



