54 Eev. T. A. Marshall's monograph of 



from the stigma, which is longer than the metacarpus ; radius 

 uniformly curved, its 1st abscissa often punctiforrn, or obsolete, 

 the 2d cubital areolet, in the latter case, touching the stigma. 

 Recurrent nervure interstitial; prse- and pobrachial areolets of 

 equal length ; stigma large, triangular. Mesothoracic sutures 

 visible or obsolete. Metathorax elongate, not vertically truncate, 

 nor excavated posteriorly. First abdominal segment sublinear, 

 petiole and tubercles indistinct ; segments 2 — 3 together covering 

 most of the abdomen, segment 4 very short, the rest inconspicuous, 

 mostly retracted. Terebra concealed, subulate or falciform, 

 decurved ; valves ovate, stout. 



Nees von Esenbeck established this genus upon two 

 female specimens of his E. pallklicornis, in which the 

 discoiclal and cubital areolets are nearly obsolete; hence 

 he was led to place them among the Oxyura. Curtis, 

 however, the year before, had already brought forward a 

 number of English species under the name of Leiophron, 

 with a figure of L. apicalis ; but his descriptions of the 

 others'are mere outlines. Haliday, in the Ent. Mag. for 

 1834, redescribed most of the species of Curtis, and 

 placed the genus upon a sound basis, though still under 

 the name of Leiophron. Wesmael in the next year 

 (1835) published two more species, barbiger and clavi- 

 ventris, which he referred to a special section of his 

 Microctonus, distinguished by having the terebra con- 

 cealed. In 1856 Euthe, in his paper on Microctonus in 

 the Stett. Zeit., assembled twelve species known to 

 Wesmael and himself, forming the last section of the 

 genus. A list of all the species, under the name of 

 Euphorus, is given by Eeinhard in the Berl. ent. Zeits. 

 for 1862, divided into the two sections devised by 

 Haliday ; and Forster in the same year gave to these 

 sections generic rank under the names of Peristenus and 

 Euphorus, the former of which is not here adopted. 



Table or Species. 



(2) 1. First abdominal segment scarcely longer 



than broad . . . . . . . . 1. mitis, Hal. 



(1) 2. First abdominal segment 3 — 5 times longer 



than broad. 

 (14) 3. Mesothoracic sutures distinct and punctate. 

 (13) 4. Antenn.'C of the J more than lG-jointed 



(except occasionally in Sp. 1) ; of the 



$ more than 17-jointed. Pobrachial 



areolet of the hind wing closed by a 



transverse nervure. 



