1S92.] 94 



M. LONorvRs, iNIgii. 



I have not seen a specimen of tliis species, but it is recorded as British by 

 Walker. It is described as liaving a ver}' narrow frontal stripe ; antennoe with the 

 third joint not much longer than the second ; thorax with indistinct stripes ; abdo- 

 men with the dark dorsal stripe so narrow over the first abdominal ring that in the 

 female the yellow sides coalesce and form a large oval pa'ch ; the legs are also longer 

 than in the other species, the hind femora reaching to the eud of the abdomen. 

 Yery rare. 



M. iNAisiis, Fin. 



This (the most common, and the typical species) closely resembles M.fenestrata, 

 it is, however, usually rather larger, and altogether paler in colour ; the frontal 

 stripe is as wide as the sides of the frontalia, instead of being narrower ; the thora- 

 cic stripes are finer, the seutellum yellow instead of greyish-yellow, the stripe on the [951 

 back of the abdominal segments is rather narrower, and the yellow patches on the April, 1892 

 sides extend on to the third segment ; the anal segment in the male is rufous or 

 yellow instead of grey, the outer cross vein is rather nearer to the angle of the fourth 

 longitudinal, being placed at about one-third of the distance between that and the 

 inner cross vein, instead of two-fifths ; the fore femora also are quite yellow. Not 

 uncommon. 



M. PACIFICA, MgU. 



This species differs from all the former ones by having the abdomen entirely 

 grey, with the exception of a small yellow patch on each side of the first segment ; 

 the third joint of the antennae is longer, it being between two and three times the 

 length of the second ; the palpi are thicker at the ends ; the seutellum is grey ; 

 and the wings have the fourth longitudinal veins bent more at an angle. Rare ; 

 I captured one near Ulverstone, in Lancashire, in 1889 ; it is also in Miss Prescott- 

 Decie's collection. 



33.— LESKIA, Dsv. 



Myobia, p. Mgn. and Mcq. 

 Ptbkosia, p. End. 



I have introduced this genus out of its numerical position in my 

 analytical table owing to its close aiBnity to the preceding one, from 

 which it scarcely differs, except by having the third joint of the an- 

 tennae a little longer. Meigen and Macquart both place the only 

 species which it contains in Myohia, and Rondani includes it in his 

 genus Pyrrosia. E. Desvoidy thus defines the genus: ''Tons les 

 caracteres du Genre Myobie, le troisieme article antennaire triple du 

 deuxieme qui est plus court, teintes jaune."* Though the characters 

 of the two genera are, therefore, almost identical, still the species 

 referred to LesMa is peculiar, and differs in appearance (being wholly 



* Essai sur les Myodaires, p. 100. 



