1912.] 107 



male having been taken on the Monnow, 5/7/10, and the female 

 in the house, 9/10/10. 



MaUochi. When introducing it I could only give Scotland as a 

 locality. I can now record it from my own neighbourhood. Four 

 females were swept out of rough herbage in Mainswoood, from March 

 to May, 1910 ; and on the very last day of this same year a male was 

 turned out from amongst the remains of an old deserted hive-bees* 

 nest in a hollow overturned tree near Devereux Pool. In the Hereford- 

 shire insect the costa seems shorter than in the Scotch one, and even 

 in the female does not reach the wing middle. The discrepancy may, 

 however, be due to the position of the wing in Mr. Malloch's specimens 

 not lending itself so well to a correct estimation. 



Minor, Zett. I had very little material before me when describing 

 it, one of each sex only, and the diiference, especially in the colour of 

 the legs was so marked between them that there was some little 

 doubt whether they could belong to the same species. Since then I 

 have been able to examine a second male taken by myself in September, 

 1909 ; a female taken by Mr. Collin, at Barton Mills, 19/5/09 ; and a 

 pair in cop. also taken by my friend at Aldeburgh, 18/9/07. With this 

 enlarged material, one has learnt that the colour characters are very 

 variable and not governed by sex. In my second male the coxae are 

 not black but dusky yellow, (all these parts in the male described in 

 the text being black) and the palpi dark. In the mated female the 

 coxae and femora are uniformly black, whilst these parts in the other 

 female are pale as in my described female, though of a less pure tint, 

 being dusky yellow rather than yellow. The palpi in Mr. Collin's 

 females are dusky yellow and in my single example clear yellow. One 

 or two points need correction in the text. The legs of the male are 

 quite black and not brownish black as there given ; neither are the 

 male palpi large; they are only fairly long and slender, and the 

 halteres are white rather than yellow. 



Angustifrons, sp. n. This belongs to the short fringed division in 

 Section C, and runs down to the neighbourhood of uliginosa, having 

 like it bare pleurse and yellow halteres, but is otherwise abundantly 

 distinct. 



? . Thorax and abdomen black ; frons narrow, longer than broad, and 

 dull ; the inner bristle of lower frontal row much below the level of the outer 

 one, but fairly away from the eye margin ; one pair only of small supra-antennal 

 bristles, moderately approximated ; palpi clear yellow ; antennae brown ; wings 

 tinged with yellowish brown, costa well beyond wing middle and densely 

 fringed ; 1 rather longer than 2 + 3, 2 barely half as long again as 3, angle at 



