B. clavipes^ Mg. 



164 AN ACCOUNT OF BRITISH FLIES. 



' B. rujipes, Mg. 

 Tipula pyri, F. 

 B. Johannis, L. St. John's Fly = \ Hirtea prcecox, F. 



T. pomojia^, Schrk. 

 \B. hyalina, Mg. 

 This is a common and widely distributed species, occurring about 

 St. John's day, hence its name. The $ is black with black hairs ; 

 legs testaceous, tarsi dark at the tips ; antennae, palpi and halteres 

 black ; the wings grayish-brown, darkest along the costal region ; 

 stigma dark brown, and the wings dark at the base, having a yellowish- 

 red tinge when alive. The ? dark black ; legs reddish, femora 

 black, the tarsi dark at the tips ; stalk of haltere brown. Wings 

 brownish ; the whole body clothed with short hairs. Length 2 

 to 3 lin. 



Hirtea Johannis, F. 

 B. dorsalis, Mg. 

 B. flavicollis, Mg. 

 H. ephippium, Zett. 



(J black ; black hairs on head and thorax, white or gray on the 

 abdomen. Legs dark brown. The stigma is yellowish-brown. In 

 the ? the pectus and abdomen are tawny beneath, the thorax 

 generally red or reddish-brown, with two or three brown stripes. 

 The legs are testaceous ; tips of femora, tarsi and anterior tibice 

 black. 



There seem to be several varieties, in one the thorax has two red 

 spots in front, in the second the red thorax has three dark stripes, in 

 the third there are two dark brown stripes, and in another variety 

 the thorax may be entirely red. This is an abundant species, and 

 one subject to great variety, and may be found in woods. Length 

 3 to 4 lin. 



B. nigriventis, Hal. 



(^ black ; head and thorax clothed with black hairs ; abdomen 

 with whitish hairs. Tarsi and hind tibia; reddish-brown. In the ? 

 the legs are reddish ; the cox^, trochanters, tips of tarsi and spines 

 of the fore tibiae black. This is not a very abundant species, it 

 appears in the spring. Length 2 to 3 lin. 



B. /encopferis, Mg. 

 Black with black legs. Wings of ^ milk white, ? dark brownish- 

 black, stigma and veins black in the latter. Hairs black on the 

 head, thorax, antennae, palpi and legs. (Sys., Beschr., i., 313, 314, 

 18 1 8, Meigen). 



