136 A Monograph of Culicidae. 



Length. — 8 to 9 mm. 



Habitat. — Sao Paulo, Brazil (Dr. Lutz). 



Time of capture. — June and July. 



Observations. — Redescribed from a perfect $ and ? given me 

 by Dr. Lutz. 



The black caudal tuft of the $ separates it from all species 

 but trichopygus, the palpi, however, at once distinguishes it from 

 that \ in the ? the caudal tuft is black also, but there is a white 

 tuft in front of it on each side. It seems to be the most 

 abundant Megarhinus in Sao Paulo. 



The larvae are carnivorous and have been taken in the waters 

 of wild bromelias principally Aeehmea tinctoria. 



The males, Lutz states, can be found in woods where they fly 

 about rapidly. 



Megarhinus chrysocephalus. n. sp. 



Head entirely clothed with burnished golden scales with 

 coppery sheen. Thorax clothed with golden-brown and coppery 

 scales, an azure blue line in front of the wings ; prothoracic lobes 

 mauve. Abdomen metallic violet basally, purple red apically 

 with small lateral basal silvery white spots, caudal tuft of $ 

 deep brown ; palpi purple with brilliant coppery sheen, golden 

 beneath the second and third segments, a white spot at the apex 

 of the antepenultimate segments above. Legs unbanded. 

 Allied to M. solstitialis. 



$ . Head entirely clothed, with flat burnished golden scales, 

 violet towards their bases, those along the nape deep violet, those 

 at the sides paler, two bright golden median chaetae, the others 

 brown. 



Palpi deep violet with brilliant coppery-red sheen, apex of 

 first segment white, the acuminate apical segment is not quite 

 twice the length of the penultimate, the antepenultimate about 

 the same length as the penultimate, the next segment smaller, 

 the apices of the segments slightly swollen. 



Antennae with dense mauve and creamy scales on the large 

 second segment, a few pale golden ones on the next few following 

 it ; plume-hairs deep brown ; proboscis deep metallic violet, thin, 

 labellae long and acute. 



Thorax deep brown, clothed with broad spindle-shaped 

 metallic bronzy scales, some flat azure-blue ones in front of the 

 roots of the wings ; over the roots of the wings some long flat 



