MOSQUITOS OF THE PALAEARCTIC REGION. 327 



Like the other species of the genus, this is a dark-coloured insect, with entirely 

 dark tarsi and mainly white venter, and with flat scales, mostly dark, covering the 

 head and scutellum. It differs from all its congeners in having a distinct if narrow 

 band of black scales at the apex of each abdominal sternite. The male palpi resemble 

 those of Stegomyia, but are entirely dark. I am indebted to Dr. H. G. Dyar for 

 information as to the identity of Coquillett's type. 



The larvae live in bamboo stems, and have been described by Banks (Phil. J. 

 Sci., A. iii, p. 240, 1908). They have remarkably large, sausage-shaped anal gills, 

 which enable them to remain long periods at the bottom. 



Distribution.- — Japan (Kofou, L. Drouard de Lezey ; Kouy-Tcheou, Fortunat ; 

 Hakone, E. Gallois ; Tokio, Yaniada) ; also throughout the Oriental region, and 

 extending into Celebes, New Guinea and North Australia. 



Genus Lutzia, Theobald. 



Owing to the higlily modified larval mouth-parts and antennae, and the peculiar 

 structure of the siphon and anal segment, it was long ago proposed by Christophers 

 to separate the Old World species of this genus from Culex as a distinct genus 

 {Jamesia) ; the same characters were used by Dyar and Knab in separating the 

 New World Lutzia from Culex. In revising the African Culicidae in 1912 I did 

 not accept this separation, owing to the apparent structural identity of the adults. 

 I now find, however, that an excellent diagnostic character exists in the numerous 

 lower mesepimeral bristles of Lutzia, and I therefore propose to revive this name. 

 There is no real difference between the Old World and New World forms, and I 

 consider Dyar's separation of Jamesia and Lutzia on a small detail of aedoeagal 

 structure to be quite unjustifiable. The Old World species are all very similar, 

 their separation resting on small differences of colour and venation. 



Lutzia vorax, sp. n. (fig. 5 d). 



Penultimate joint of male palpi with the integument and the hairs dark except 

 at the extreme tip. Abdominal tergites in both sexes all with rather narrow but 

 distinct apical pale ochreous bands. Lobes of mesosome of male aedoeagus enlarged 

 beneath a little beyond the middle, the enlargement with some minute teeth ; lobe 

 of side-piece with three strong spines only. The whole of the outer side of the hind 

 femora has the light and dark scales about evenly mixed. Cross-veins either in a 

 straight line, or else m-cu (posterior) placed beyond r-m (mid). 



L. concolor (R.-D.), Theo., the commonest form in the Oriental region, differs 

 in having the last few abdominal segments entirely yellow-scaled, the yellow bands 

 on the anterior segments narrower ; the lobes of the mesosome are not enlarged 

 beneath ; the lobe of the side-piece usually has a fourth spine more or less developed, 

 separate from the other three ; the outer side of the hind femora is entirely pale at 

 the base, from which a more or less definite pale line runs almost to the apex ; and 

 the cross-vein m-cu is placed at least slightly before r-m. 



L. halifaxi (Theo.), known from the Malayan region and Queensland, has the 

 hypopygium almost identical with that of L. vorax, the enlargement of the mesosomal 

 lobes perhaps more prominent and practically in the middle ; it differs in having 

 the integument and hairs on the apical half or more of the penultimate joint of the 

 male palpi paler than the basal part, and in having few or no pale scales on the apices 

 of the abdominal tergites ; the hind femora are as in L. vorax, but darker ; the cross- 

 veins, on the other hand, are placed as in L. concolor. 



Dr. Lamborn found the larvae in old cess-pits pre^dng upon Culex fatigans. 



Distribution. — Japan (Tokio, Yamada ; a series presented to the British Museum 

 in 1916, determined at the time as Culex concolor; the type of the new species is 

 one of the three males in this series ; also Karuizawa, Cornford, and Nagasaki, 



