THE ANIMAL PARASITES OF MAN 



Genus. Chagasia, Cruz. 



"Brazil-Medico," 1906, xx, pp. 20, 199. 



This genus can at once be told by the antennal segments having many dense 

 scaly tufts. Type, C.fajardoi, Lutz, from Brazil. 



Genus. Calvertina, Ludlow. 



Canadian Entomologist, 1909, xli, pp. 22, 234. 



The antennae 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. Bironella, 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. Megarhininae. 



Three genera occur in this marked sub-family ; they are the largest of all mos- 

 quitoes, 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 : 

 a. Palpi long in both sexes. 

 . Last segment of $ palp round or blunt 



as if broken ... ... ... ... Genus Megarhinus, R. Desvoidy. 



0. Last segment of $ palp long and 



pointed Genus Ankylorkynckus, Lutz. 



aa. 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. 



" Mem. 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. 

 All large brilliant mosquitoes with long palpi in both sexes and, as a rule, with 

 a caudal fan of scales ; the proboscis is long and bent. They are all sylvan species, 

 and are not so far recorded as biting man. 



Genus. Toxorhynchites, Theobald. 

 " Mono. Culicid.," 1901, i, p. 244 ; 1903, iii, p. 1 19 ; 1907, iv, p. 140 ; 1910, v, p. 95. 



Differs from the former genus in that the female palpi are short. The palpi may 

 have one, two or three minute terminal segments. Banks's genus Worcesteria has 

 three. 



The elephant mosquito of India (T. immisericors}, Walker, bites very severely. 

 They are sylvan species. 



