MOSQUITOS OF THE PALAEARCTIC REGION. 339 



very large, flat, very much broadened a little beyond the middle, ending in a rather 

 long sharp point ; terminal claw very minute ; subapical spiny crest sHghtly indicated. 

 Tenth sternites with moderate basal arm. Second division of mesosome with three 

 rather large teeth and about five small ones. 



The hypopygium is more like that of C. laticincius than that of C. mimeiicus. 

 It would be of interest to know whether there is any similar resemblance in the larvae. 



Distribution. — Japan (Tokio, Yamada). A series presented by the collector 

 to the British Museum in 1915 was determined by me then as C. mimeticus, but a 

 closer study reveals the striking differences enumerated above. Also Yokohama and 

 Kobe [Lamhorn) ; the larvae in rice-fields in company with Anopheles hyrcanus. 



12. Culex tritaeniorhynchus, Giles. 



Ciilex iritaeniorliyiichus, Giles, J. Bombay Nat. Hist. Soc. xiii, p. 606 (1901) ; 

 Edwards, Bull Ent. Res. iv, p. 233 (1913), and vii, p. 224 (1917). 



This species is sufficiently distinguished by the characters mentioned in the 

 key, but I have given a number of others in the papers quoted above. The average 

 size is very small (3 mm.), but in this respect the species varies a good deal in different 

 parts of its range, Japanese examples being much larger than those from Palestine. 



Larvae have been received from Capt. Barraud from Mesopotamia ; they are 

 remarkably similar to those of C. perexigims, described below ; I can discover very 

 few differences beyond those mentioned in the key, which seem most likely to be 

 constant. Other larvae from Ceylon differ slightly from these, but not to such 

 an extent that they need be separated specifically. They are found usually in 

 salt marshes, often in company with other small species with a banded proboscis 

 (C. vishnui or C. sitiens). 



Distribution. — Palestine and Mesopotamia [Barraud) ; Palestine (Khirbet Hardrah, 

 Austen ; Jerusalem, Goldberg) ; Japan (Tokio, Yamada ; Chuzenji, Gallois ; 

 Nagasaki, Lamborn) ; China (Shanghai, Lamborn, etc.). Also throughout the Oriental 

 region and on both the east and west coasts of Africa. 



13. Culex vishnui, Theobald. 



Culex vishnui, Theobald, Mon. Cul. i, p. 355 (1901) ; Edwards, Bull. Ent. Res. iv, 

 p. 233 (1913), and vii, p. 225 (1917). 



In spite of the very slight difference in the hypopygia (there are perhaps some other 

 slight distinctions besides the one mentioned in the key) I feel sure this species is 

 distinct from C. tritaeniorhynchus, its closest ally and frequent associate. C. vishnui 

 breeds in rice-fields, salt-marshes, and elsewhere. No isolated larvae have been 

 received at the British Museum, nor has a description of the early stages been 

 published. The hypopygium is very similar to that of C. mimidus. 



Distribution. — Mesopotamia. (Barraud) ; Japan (Osaka, Theobald). Also through- 

 out the Oriental region, but as yet unknown from Africa. 



14. Culex tipuliformis, Theo. (figs. 15, 16). 



Culex tipuliformis, Theobald, Mon. Cul. ii, p. 325 (1901) ; Edwards, Bull. Ent. 



Res. ii, p. 262 (1911), and iii, p. 31 (1912). 

 Ctdex creticus, Theobald, Mon. Cul. iii, p. 189 (1903). 



Apart from the striped femora and tibiae, and the more or less produced abdominal 

 bands, this might easily be mistaken for C. pipiens, especially in rubbed specimens. 

 It is, however, generally darker in colour, the upper fork-cell is not so long, and the 



