isoi.j 229 



All the species of Nemorcea have the thorax black or grey, some- 

 times with a green or bluish tinge ; it is always also more or less 

 distinctly marked with either three or four longitudinal stripes, and 

 whitened with grey tomentum on the front margin and sides ; in my 

 diagnosis of the different species I shall, therefore, only mention its 

 colour when it varies from the ordinary type. The same remarks will 

 apply to the colour of the legs, which is black or dark grey in all the 

 species. 



N. GLABEATA, Mgn. 

 I have not seen either a British or foreign specimen of this species, but have 

 introduced it owing to its being recorded as British by Mr. F. Walker in the sup- 

 plementary list of British Tachinids published in the Appendix to the second vol. 

 of the Insecta Britannica. 



N. RUBRICA, Mgn. 

 This and the foregoing species are the only two recorded British ones that 

 belong to Rondani's restricted genus NemorcBa, in which the middle abdominal 

 segments are without seta on the disc. N. ruhrica has the thorax marked with roQr)1 

 four longitudinal stripes of nearly equal width, and has four external dorso-central Aug., 1891. 

 bristles behind the transver-e groove ; the scutellum is reddish-brown, the apex 

 usually only being rufous in the female ; the palpi and the two basal joints of the 

 antennte are red ; the abdomen is reddish-yellow with a black longitudinal stripe, 

 and shows white reflections; the wings are brown with yellow roots. Very rare. 



N. PUPARUM, F. 



This is distinguished from all the other recorded British species by having the 

 cheeks below the termination of the fronto-orbital bristles clothed with a few fine 

 scattered hairs.* The cheeks are white with black reflections, and the hairs upon 

 them are pale in colour and not very easy to see. The chin is thickly covered with 

 long hairs ; the eyes are subcontiguous in the male ; the palpi are yellow ; the an- 

 tennae have the basal joints grey or sometimes red, and the third joint black-brown 

 with the base often red ; the thorax has three stripes, the central one being very 

 wide, and four external dorso-central bristles behind the transverse groove ; the 

 scutell um is rufous ; the abdomen is blackish-brown, the sides of the second and 

 third segments being red in the male ; the front borders of the second, third and 

 fourth segments are also encircled with an even, wide, subinterrupted white band ; 

 the wings have the fourth longitudinal vein bent at an acute angle, the external cross 

 vein sinuous, and the little cross vein nebulous. Rare. 



N. STRENUA, Mgn. 



This has the cheeks quite bare ; the antennse are in great part yellow, and paler 

 in the female than in the male ; the eyes in the male are subcontiguous ; the peris- 

 tome is red ; the thorax is marked with four rather narrow stripes, and has four 



* These characteristic hairs must not be confounded with others that are present on the sides 

 of the frontaha in this and other species between the fronto-orbital bristles and the eyes. 



