204 [September, 



Early in spring during the last three years I have taken a species 

 of Phora commonly here which I have confounded with lugubris, Mg. 

 For want of typical specimens of that species I allowed those to 

 remain in my series, and I have given several away to friends as 

 luqubris. Lately I obtained a good series of the true lugubris, and I 

 at once saw that my specimens were quite different and belonged to 

 a species not in the British list. I have accordingly now resolved to 

 describe the species so that it may be possible to clear up this matter 

 a little for others who may be situated as I was before I got sufficient 

 material to assist me. 



PlIORA INTERMEDIA, 11. sp. 



J , 9 • Black ; frons shining, short, about half as long as broad, frontal bristles 

 strong, lower row convex ; 3rd joint of antennas large in the £ , moderately large 

 in 9> arista pubescent; palpi in the $ large and broad with weak marginal 

 bristles, in 9 narrow with strong end and weaker marginal bristles ; proboscis in 

 6* small, in 9 large and projecting beyond the palpi ; thorax shining ; seutellum 

 with four bristles, the basal pair distinctly weaker than the apical ; halteres black ; 

 abdomen hardly shining, 1st and fith segments lengthened in both sexes, 1st segment 

 emarginate posteriorly ; the peculiar patch present at the base of the 2nd segment 

 of the abdomen in lugubris is also seen in this species, but more distinctly ; hypo- 

 pygium large and glossy, smaller than in opaca, but very similar in appearance ; 

 intermedia may always be distinguished by the single process on the right side 

 (viewed from behind) being simple at the tip and not dentated, and also by the pair 

 of processes on the left side being much more dissimilar in size than in opaca, the 

 outer being about three times the size of the inner ; anal protuberance small and 

 black with a few long hairs ; legs black, yellow generally present on all the joints 

 in variable proportion, the fore-tibiae and the tarsi usually pale; fore-tarsi thickened, 

 longer than the tibiae by the length of the last joint ; fore-tibiae with one bristle 

 below the basal third and no apical bristle; inid-tibise with two bristles in the 

 basal third and an outer fringe of short hairs, apical spur long ; hind tibiae with 

 one bristle situated almost on the middle ; wings in the $ tinged with brownish- 

 yellow, in the 9 much darkened ; costa to beyond the middle of the wing, 

 thickened on the outer half and short fringed; 1st division slightly longer than 

 the 2nd ; 3rd vein forked, and distinctly thickened ; 1st thin vein leaving the 3rd 

 thick vein at considerably beyond the fork with a gradual sweep and ending nearly 

 straight at I In- wing tip ; 11 h thin vein ending abruptly in both sexes at about two- 

 thirds to the wing margin. 2 — 2£ mm. 



This species differs from lugubris, Mg., in the unequal size of the 

 scutellar bristles, in the position of the hind tibial bristles, in the 

 absence of the rectangular twist to the base of the 1st thin vein, in 

 the abbreviated 4th thin vein, and its smaller size. From opaca, Mg., 

 it may be distinguished by the length of the abdominal segments, by 



