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25. 

 PSEN EQUESTRIS. 



Order Hymenoptera. Fam. Larridse Lat. 



Tr/pe of the Genus, Pelopseus compressicornis Fab. 



PsEN Lat., Jur., Panz., Van. Lind., Shuck., Curt. — Trypoxylon, Pelopaeus 

 Fab. — Mimesa Shuck. 



AntentKE inserted near the centre of the face, clavate, curved, and 12- 

 jointed in the female (1) : 13-jointed and more filiform in the male ; 

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

 Labrum transvei"se, subrotundate before, entire and ciliated. (2.) 

 Mandibles slender, scarcely arcuated, bidentate, the teeth obtuse. (3.) 

 Maxillce divided transversely, terminal lobe rounded and ciliated : 

 Palpi longish, 6-jointed ; first joint very small, third the largest, fourth 

 as long, fifth the longest, sixth long and slender. (4.) 

 Mentum large, dilated in the centre, hairy (5. a. the point to which 

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

 joint very long, second and third short, fourth robust, elongate-ovate. 

 (b.) Lip short and broad, the edges conniving internally, (c.) 

 Clypeus convex and rounded, anterior margin elevated. Head transverse, as 

 broad as the thorax, with a tubercle between the antenna. Eyes oval, en- 

 tire, remote. Ocelli 3, inserted on the crown in a triangle. Thorax short, 

 nearly ovate. Scutellum small and subquadrate. Abdomen ovate-conic, 

 with an elongated linear petiole. Superior wings with a lanceolate mar- 

 ginal cell, not extending to the apex, and three perfect submarginal cells, 

 the middle one trigonate, receiving either one or two recurrent nervures. 

 Legs rather small. Tihise spuried. Tarsi 5 -jointed, basal joint ?iearlg 

 as long as the three following, last terminated by simple claws and 'pulvilli. 

 (8. afore leg.) 



Equestris Fab. — Curt. Guide, Gen. 691. 3. 



Black : clypeus and face silvery with hair, shining ; first segment of 

 abdomen rufous, with a black spot at its base ; second entirely, and 

 third partly, rufous in the female, with the 2nd segment only rufous 

 in the male : wings hyaline, iridescent : antennae rufous beneath : 

 thighs and coxae black : tibiae and tarsi pale ferruginous, the hinder 

 tibiae subochreous at the base. 



In the Author's and other Cabinets. 



The three lobes of the lip mentioned by Latreille in his observa- 

 tions upon the Larridce, I could not discover in the species dis- 

 sected ; and he does not mention that organ in his generic descrip- 

 tion. The females from which the characters and figures are taken, 

 are armed with sharp stings, that are not entirely concealed. 



In mv illustration of the genus PefnphcdoJi, fol. 632, I liave al- 



366 



