278 Rev. T. A. Marshall's monograijh of 



probably agree with Nees, Wesmael, Eatzeburg, and 

 Forster in considering the genus here rightly placed. 

 Wesmael, in 1837, published it under the name Ischius ; 

 Hartig in the same year united it with Eubadizon ; and 

 Ratzeburg (1844 — 52) distributed the three species known 

 to him under Iscliius, Microdus, and a new genus named 

 MacrojMlpus. Orgilus is fully discussed, and four species 

 described, by Eeinhard, I. c. 



Orgilus ohscurator, Nees. (PL VI., fig. 6). 



Microdus ohscurator, Nees, Mon., i., 151 ; Icevigator, 



150 ; annulator, 152, ? . 

 Orgilus ohscurator, Hal., Ent. Mag., iii., 145 ; Eeinh., 



Berl. ent. Zeit., 1865, p. 263, c? ? ; S. v. Voll., 



Pinac, pi. 29, f. 9 ( ? abdomen). 

 Ischius ohscurator, Wesm., Nouv. Mem. Ac. Brux., 



1837, p. 21, pi. (wing) ; Eatz.. Ichn. d.Forst., ii., 



46, a^ ? . 

 Euhadizon lejitocephalus, Hart., Jahresb., 1837, p. 268, 



^ 2 . 

 Macropalpus leptocephalus, Eatz., Ichn. d. Forst., i., 



57, a" $ , pi. vii., f. 9 (with parts of the mouth). 



Black, witli black palpi ; 4 anterior femora at the apex and 

 underneath, and the tibiae more or less, rufescent. Wings in- 

 fumated, with a decolorous angiilated mark beneath the stigma, 

 which, as well as the ner-\au-es, is fiiscous. Antennae 27 — 33- 

 jointed, of the ? as long as the body, of the $ , longer. Head and 

 thorax hardly shining ; mesothoracic sutm-es shallow. Meso- 

 plem-ae, at least above the fovea, smooth. Metathorax rugulose. 

 Segments 1 — 2 minutely and thickly exarated, dull ; the apex of 

 both, and sides of the latter, with the remaining segments, smooth 

 and shining ; segment 2 not shorter than its basal breadth. Hind 

 coxae dull, pubescent. Terebra sometimes as long as the body ; 

 usually somewhat shorter, c? $ . Length, 1| — 2^; wings,2J— 3^ liu. 



Var. (? . Antennae at the base, and 2d abdominal segment at 

 the sides, rufous. 



The variations are trifling, and never such as to 

 obscure the species. The wings are more or less dark, 

 and segments 1 — 2 sometimes nearly smooth. 



Not Uncommon, especially on sandy coasts ; found by 

 Haliday in England and Ireland ; by me often at Milford 

 Haven, in the Isle of Wight, and in the Forest Hills, 

 Leicestershire ; also at Eannoch ; in Corscia, and the 



