Genus Protoculex. 467 



that the median area resembles a very broad lme 3 taking up most 

 of the thorax ; scutellum testaceous, with two dark patches and 

 with narrow-curved greyish-white scales ; six posterior border- 

 bristles to the mid lobe ; metanotum dee}) brown : pleurae 

 testaceous with some flat i>*rev scales. 



Abdomen testaceous with brown scales with violet 

 reflections, the segments with large basal lateral grey spots, in 

 some cases almost meeting to form bands, and the last two 

 segments with many grey scales, not densely hairy, but the 

 posterior border hairs long and pale and prominent laterally. 



Legs brown, unhanded ; femora silvery grey beneath, and 

 the whole legs show pale dull iridescent colouring ; ungues of 

 fore and mid legs unequal and hind equal, all six uniserrate. 



Wings with the first sub-marginal cell longer and much 

 narrower than the second posterior cell, its base very slightly 

 nearer the apex of the wing, its stem nearly as long as the cell, 

 stem of the second posterior cell very little longer than the cell ; 

 posterior cross- vein rather more than its own length distant from 

 the mid ; scales rather broader than in Culex. especially the 

 median vein scales. 



Length. — 2 to 3 mm. (proboscis 1"5 mm.). 



Habitat. — Baton Rouge, Louisiana (D. W. Coquillett) ; New 

 Jersey (J. B. Smith). 



Time of appearance. — July to September. 



Observations. — The male resembles Arribalzaga's conjirmutus 

 more than my serratus, but it can at once be told by the pale 

 mesothoracic scales extending over all the thorax. The serrated 

 hind ungues of the male are prominent and also the apical grey 

 hue of the dark brown antennal plume-hairs. The <j> resembles 

 a small serratus. Felt states that the larvae were met with in a 

 woodland pool, and are remarkable on account of their remaining 

 near the bottom. Thev were never observed in confinement to 

 rise voluntarily to the surface. They are very inconspicuous and 

 transparent, and they hide amongst the leaves at the bottom of 

 the pools. The larva is described by Professor J. B. Smith. It 

 has the head almost twice as broad as long ; antennae half as long 

 as the head, almost uniform in thickness two-thirds from the 

 base, then tapering to the tip, which has four spines and a 

 stout, short segment ; lateral hair-tuft sparse, near middle. Air 

 tube tapers evenly to the tip, each pecten composed of about 

 twelve uniformly tapering spines, the latter with three sharp, 

 well-defined teeth near the base. Comb composed of from eight 



2 h 2 



