Meade : Exorista hoetulana in Britain. 181 



Britannica, nor (I believe) by any other British entomologist. The 

 genus Exorista belonging to the family Muscidse and sub-family 

 Tachiniidge, may be thus brielly characterised: — Eyes hairy; 

 antennae with the third joint more than twice the length of the 

 second ; style quite bare ; oral vibrissae not extending more than 

 half way up the face ; wings with the first posterior (or middle) cell 

 open at its extremity, and terminating before the tip of the wing ; 

 abdomen oval, with the first ring short. E. hortulana. — Nigro- 

 cserulea ; thorace lineis quatuor nigris ; abdomine faciis albo- 

 cinereis inequalibus ; linea dorsali et ventro nigro ; palpis testaceis ; 

 pedibus nigris. Long. 4 lin. Male, blue black. Head : frontal space 

 about one-fourth of the width of the head ; central stripe brown ; lateral 

 margins white with black grey reflexions, and ciliated with numerous 

 small black hairs in addition to the row of bristles which extend down 

 the face to a little below the end of the second joint of the antennse ; 

 face oblique, silky white ; antennae with the first joint very short, the 

 second somewhat elongated, the third stout and between two and 

 three times as long as the second; style with both the nasal joints 

 very short and indistinct, the third long, quite bare, and thickened 

 for about half its length; two very large bristles (vibrissae) are 

 seated one on each corner of the apistome, above which a few small 

 ones, gradually decreasing in size, extend up about one-third of the 

 face ; palpi yellow for about half their length, but black at the base. 

 Thorax blue black, with grey reflexions on the anterior margin and 

 shoulders ; has four narrow longitudinal black stripes, the middle 

 pair rather wide apart, and indistinct posteriorly. Scutellum blue- 

 black. Abdomen tessellated with black and white reflexions, 

 arranged in irregular bands on the three posterior segments, and 

 marked on the dorsum with a longitudinal black stripe, which is 

 wider on the second segment ; first segment short and quite black ; 

 second, with a very narrow interrupted white band on its anterior 

 margin, and a large irregular white spot on each side ; third and 

 fourth segments with wide irregular transverse bands of whitish 

 reflexions on their anterior parts, and with the posterior margins 

 black ; second segment with two large spines on the edge of the 

 posterior margin, but with none on the disk ; third and fourth 

 segments with spines both on the margins and disk ; belly black. 

 Legs black ; posterior tibiae ciliated along their outer sides with 

 short bristles of even lengths, and having one long spine a little 

 below, the middle. Wings hyaline ; posterior transverse (discal) 

 vein oblique and slightly sinuous ; fourth longitudinal (prsebrachial) 



