On Scent-organs (?) in Female Midges. 365 Length about 13 mm. Ocelli absent. Body creamy white (i. e. without general pigment), but marked on either side with a row of yellow to reddish-brown spots which are lacking on the five front body-segments. The body is sparsely furnished with relatively long hairs. Types in the Brade-Biiks collection. In the field the most noticeable difference between T.guttu-latus and the new species is the paleness of the latter. In T. guttulatus the dark spots which run down either side of the body are very conspicuous, whereas the corresponding rows of yellow to reddish-brown spots seen in P. pallidus are hardly visible to the naked eye. S.E. Agricultural College, Wye, Kent, 21st July, 1920. XLL— Scent-organs (?) in Female Midges of the Palpomyia Group. By F. W. Edwards. (Published by permission of the Trustees of the British Museum.) During the first half of June of this year, while staying near Dartmouth, I noticed on several successive evenings a swarm of flies which I at first took to be the males of a rather large Chironomus, such as C. dorsalis, Mg. On netting
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