15G fJ""^' 



(peristome) ; chin rufous, elothed with soft hairs ; palpi black or piceous ; thorax 

 inarkcd upon the front margin with four widish black stripes, the central pair often 

 divided by a narrow line ; external dorso-central bristles, three behind the transverse 

 groove ; abdomen with white reflections on the sides, the first segment has two 

 central marginal spines, the second segment has two central discal ones, and two 

 marginal ones ; the third is surrounded by two transverse rows of strong setse, one 

 running across the centre or disc, and the other on or near the edge ; the fourth 

 segment is armed with numerous spines ; the legs are black ; the wings have a 

 brownish-yellow tinge, the apical cross vein is straight, with a blunt or rather 

 rounded angle at the base ; the outer cross vein is oblique and sinuous, the third 

 longitudinal vein has several setae at the base. This species, of which I do not know 

 the female, is not uncommon ; I formerly confounded it with the 31. caelehs of 

 Eondani. 



M. NITIDA, Ztt. 



This species is very similar to M. tenehricosa, but differs by having the palpi 

 black or piceous, instead of yellow ; the arista less pubescent ; the middle thoracic 

 stripes wider ; the external dorso-central bristles three instead of four in number 

 behind the groove ; the abdomen more oblong, and with more white reflections on 

 the sides. Rare ; in Mr. Dale's collection. 



M. CHALTBEATA, Mgn. 

 Glossy black or blue-black, without any white tomentum or reflections, with the 

 exception of a little on the shoulders in the female ; the eyes in the male are some- 

 what separated (subcontiguous) ; the palpi black ; the posterior external dorso- 

 central bristles three in number ; the calyptra yellow ; the halteres piceous ; the 

 wings nearly clear, with the apical cross vein nearly straight and curved at the base, 

 and the third longitudinal vein bristly from the base nearly to the little cross vein. 

 Not common ; I have captured it in Oxfordshire, also received it from Mr. Matthews 

 in S. Devon, and it is in Mr. Dale's collection. 



M. CILIAllIS, Ztt. 

 Dull grey ; eyes in the female moderately separated ; forehead rather promi- 

 nent ; frontalia white, with a rather narrow black central stripe; palpi yellow; 

 antcnnaj with the third joint nearly twice as long as the second ; arista thickened at 

 the base, long, and very slightly pubescent ; eyes very shortly haired ; thorax with 

 four black stripes, and three external dorso-central bristles behind the groove ; 

 abdomen cylindrico-conical, grey, with an irregular wide black band on the hinder 

 portions of each segment, and with two discal seta? in the centre of the second and 

 third segments, as well as two median apical ones ; legs black ; calyptra wliite ; 

 halteres yellow ; wings with a distinct costal spine, and with the apical, as well as 

 the outer cross veins, straight. Very rare ; the male is not known. 



M. GEISEA, Fin. 

 Dark grey ; male with the eyes subcontiguous ; female with them moderately 

 wide apart, and with a broad rufous central stripe down the frontalia ; antennae 

 black, with the second joint rufous in the female ; palpi black ; thorax with the 

 dorsum black in the male, and the front edge and slioulders pale grey, it has three 

 external dorso-central bristles, and is marked by four longitudinal black lines, which 

 are much more distinct in the female, in which the dorsum is grey ; abdomen grey 



