Genus Theobaldia. 149 
the past year they were active both indoors and out right 
through the winter. No ¢’s were seen until November 15th 
at Wye; they then appeared in some numbers, and were 
frequently found dead, probably having died after fertilizing 

Fig. 80 
Theobaldia annulata. Meigen. 
3 genital clasper. 
the females. This mosquito bites very severely. The following 
notes sent by W. Hatchett Jackson, Esq., D.Sec., and Radcliffe 
Librarian’ of Oxford, are of special value, and are reproduced 
in toto :-— 
Nores oN THEOBALDIA ANNULATA. 
Tt usually occurs in the flat country round Weston-super-Mare in 
large numbers during September and October; but it only invades the 
town of Weston itself to any appreciable extent when the wind blows 
from the plains—that is to say, from some quarter between N.E. and S. 
It has been relatively rare round Weston and on the Glastonbury plain 
the last few years owing tothe ponds and the wet dividing ditches, known 
in Somerset as rhines, being dry or almost dry in summer. In the 
autumn of the past year (1902) there has been a veritable plague; there 
was a sufficiency of water in the warm months and a prevalence of 
easterly winds in autumn. Hence few persons in Weston and its neigh- 
bourhood have escaped the attack of this gnat. 
The consequences of its puncture may take one of three distinct 
lines :-— 
(1) It is followed by a simple hard swelling, which, however, rises 
more slowly and disappears more slowly than the swelling caused by any 
other gnat known to me. It is also larger, and traces of it may exist for 
months—e.g., in my own case I still have a slight thickening now 
(5 Peb., 1903) due to a puncture made Nov. 8, 1903. 
(2) A swelling arises as above detailed, but it is accompanied by a 
large reddened and puffy area of inflammation. A clear vesicle con- 
taining a yellowish 1ymph develops in the centre of the hard swelling. 
There is more or less severe itching. If opened, the vesicle drains lymph 
for three to four diys, and the inflammatory area diminishes pari passw. 
