80 A Monograph of Culicidae. 



scales on the third and the fringe has not any pale spots after 

 the upper branch of the fifth. Fore ungues very unequal, the 

 larger biserrate ; mid and hind equal and simple. Claspers 

 black, horny. 



Length. — 6 mm. 



Habitat. — Brazil (Dr. Lutz); Mexico (Nat. Mus. Hung. 

 M. Biro?). 



Observations. — Described from three <j? 's and a $ . Dr. Lutz 

 saw the specimens for a few minutes and said they were Pyreto- 

 phorus lutzii, Cruz. They are certainly not a Pyretophorus and 

 belong to the genus described here, characterised by the abnormal 

 head scales. 



It differs from P. lutzii, Cruz, in first of all being a very 

 black Anopheline and not with a " fawn coloured" mesonotum 

 as in that species; moreover, there are no "erect bifurcated 

 scales " on the occiput, nor is the abdomen " fawn " coloured. 

 In the $ also the larger ungues of the fore legs are bi- not uni- 

 serrated. A great part of Cruz's description of P. lutzii, however,, 

 agrees, and the two might easily be confused unless examined 

 microscopically. 



Genus MYZORHYNCHUS. Blanchard (nov. nom). 



Bossia. Theobald. Journ. Trop. Med., Vol. II., 

 p. 181 (1902). 



Myzorhynchus. Blanchard. C. r. Soc. Biol., 

 Vol. XXIIL, p. 795 (1902). 



Mono. Culicid. III., p. 84 (1903), Theobald ; Genera Insect. Dipt., p. 9 

 (1905), Theobald; 2nd Revis. Anop., p. 37 (1904), Giles. 



This genus seems well established, having been accepted by all 

 the chief workers on Anophelinae and other Culicines. Only one 

 new species has been described since vol. iii, namely M. pseudo- 

 barbirostris, Ludlow, and a new one is described here, M. 

 strachanii. 



The genus is very distinct but the species are very obscure in 

 many cases. 



All those at present known are wild insects and breed in 

 swampy places, especially dark pools with much vegetation, and 

 waters overgrown with green weeds. They are all vicious biters, 



