The antennæ in this genus have outstanding scales on the second segment, more appressed ones on the first. At least one abdominal segment with long, flat, more or less spatulate scales. Type, C. lineata, Ludlow, from Philippine Islands.
Genus. Birónella, Theobald.
“Ann. Mus. Nat. Hung.,” 1905, iii, p. 69.
At once told by the first submarginal cell being very small. Type, B. gracilis, Theob. from New Guinea.
Sub-family. Megarhininæ.
Three genera occur in this marked sub-family; they are the largest of all mosquitoes, and are very brilliantly coloured, and many have tail fans. They occur in North and South America, Asia, Africa, and Australia. The long curved proboscis is very marked. They are usually spoken of as elephant mosquitoes; some are vicious blood-suckers at times.
The three genera tabulate as follows:—
| α. | Palpi long in both sexes. | |
| β. | Last segment of ♀ palp round or blunt as if broken | Genus Megarhinus, R. Desvoidy. |
| ββ. | Last segment of ♀ palp long and pointed | Genus Ankylorhynchus, Lutz. |
| αα. | Palpi of female short of male long. Palpi of female not more than one-third length of proboscis | Genus Toxorhynchites, Theobald. |
Genus. Megarhinus, Robineau Desvoidy.
“Mém. Soc. d’Hist. nat. de Paris,” 1827, iii, p. 412; “Mono. Culicid.,” 1901, i, p. 215; 1903, iv, p. 163; 1907, iv, p. 128; 1910, v, p. 89.