I9I4-] E. Brunetti : Review of Genera in Culicidac. 21 



or near the middle, or else a band of pale scales occurs there. 

 The 2nd and 3rd joints may taper to a point or retain a nearly 

 uniform width to the tip, or may be thickened separately, or, 

 taken together, may form a more or less distinct club. Of the 

 " genera " sunk in Culex in the present paper 6 are described as 

 possessing clavate & palpi, ri as having the cf palpi more or less 

 swollen at the tip, 21 as having non-clavate palpi, whilst of 15 the 

 a' is unknown.' Of the remainder the information is insufficient 

 or has been unavailable, some being synonyms only. 



Many intermediate stages being known to occur, no great 

 value can be attached to these differences. The question of 3 or 

 4 joints in the male in Culex rests practically on the division or 

 otherwise of the long ist joint; that of 5 joints, if so many are 

 ever present, on the presence of a small basal joint, which, more- 

 over, may perhaps be an antennal protuberance only, such as 

 exists in many diptera and which (as in some species of Phlehoto- 

 mus) has frequently given rise to controversy as to its exact nature. 



Yet when we come to the Aedes group there is little to erect 

 genera on except the palpal joints. 



In Mimomyia (type species only), Ludlowia, Megaculex, Bank- 

 sinella, Radioculex and others the & has only 2-jointed palpi clavate 

 apically, and it is on the strength of this character alone that 

 Mimomyia (with which must be united the others as S3monyms) 

 is in the present paper admitted as a good genus. The venation 

 differs slightly in the shape of the marginal cell, and perhaps in 

 some cases the shorter forked cells. 



The palpi in the Culex group, therefore, are seen to vary only 

 in the cylindrical or clavate nature of their tips in the & , or in 

 being either 2 or 3-jointed in that sex; whilst in the 9 they are 

 3 or 4- join ted, or with constrictions, 5. 



The palpi in the A edes group consist in the of , of 2 or 3 

 joints (5 in Haemagogus), the divisions less clearly marked than in 

 the Culex group. The 9 palpi vary from 2 to 5 apparent joints, 

 the basal joint often sufficiently constricted for one author to 

 regard it as two joints when another would admit only one 

 constricted joint. 



Haemagogus, Will, has 5 distinct joints as shewn in Theobald 

 (Monog. ii, 239) and thereon ranks as a good genus. Hodgesia, 

 Theob. is said to have single- jointed 9 palpi (the cf being un- 

 known), and this appears to be a good genus also. 



The palpi in the Sabethini shew much the same limits oi 

 variation as in the Culicini ; they are long in the cf and moderate- 

 ly long in the 9 in at least one genus (Eretmapodiies) , long 

 in the cf and short in the 9 in others (Trichoposopon , Hyloconops), 

 and short in cf and 9 in yet others {Sabelhes, Wyeomyia). 



As regards the number of joints they vary from 2 to 5, 

 the latter number reputed to exist in Eretmapodiies cf , whilst 



' These numbers subject to be modified b}' later investigations or by literature 

 overlooked bv me. 



