CULEX JANITOR 259 



scales; palpi rather long, black scaled, antennae and proboscis black, the latter pale 

 at the apex; basal joint of antennae testaceous. 



Thorax deep brown, with narrow-curved brown scales and black bristles, with a 

 short paler scaled line running on to the mesonotum about its middle on each side; 

 scutellum paler, with smaller narrow-curved pale scales and dark brown border- 

 bristles; metanotum deep blackish brown. 



Abdomen deep brown, with dull violet reflections, practically unhanded, but now 

 and then showing a few grey basal scales to the segments, with small basal lateral 

 white spots; venter with basal white bands. 



Legs brown, fore and mid unhanded, coxae pale, also venter of femora; hind legs 

 with pale knee spot and with narrow pale bands involving both sides of the joints; 

 ungues equal and simple. 



Wings with the first sub-marginal cell very Mttle longer, but narrower than the 

 second posterior, their bases nearly level, that of the second posterior, if anything, 

 nearer the base of the wing; stem of the first sub-marginal more than half the length 

 of the cell; stem of the second posterior rather more than half the length of the cell; 

 the mid cross-vein not quite joining the supernumerary, posterior cross-vein longer 

 than the mid, nearly twice its own length distant from it. Halteres pale, with 

 slightly darker knob. 



Length. 5 mm. 



^. Palpi brown, with one narrow pale band towards the base, the two apical joints 

 equal, both slightly paler at the base, with a few short brown hairs on each side, also 

 at the apex of antepenultimate joint; proboscis and antennal plumes brown, basal 

 joint of antennae large, pale reddish-brown. 



Thorax as in $, but rather brighter. 



Abdomen with narrow pale bands on three of the basal segments, then two with 

 large basal pale spots, not forming bands, and then a mass of dull grey scales on the 

 apical segment; densely hairy. The banding in the hind legs is more distinct than in 

 the 5, especially at the tibio-metatarsal joint, and there are also traces of banding, 

 mostly basal in the mid legs; fore and mid ungues unequal, uniserrated; hind equal 

 and simple. Fork-cells small, stem of the first sub-marginal about two-thirds the 

 length of the cell; stem of the second posterior cell nearly as long as the cell; pos- 

 terior cross-vein about two and a half times its own length from mid cross-vein. 

 Halteres pallid with slightly fuscous knob. 



Length. 5 mm. 



Habitat. Kingston, Jamaica (Dr. Grabham). 



Observations. Described from a series taken by Dr. Grabham. It bears a strong 

 superficial resemblance to Culex secutor, but differs in having an unhanded abdomen 

 in the $, in the structure of the (^ palpi, the two apical joints being much shorter and 

 rather stouter than in C. secutor. 



The species are found congregated with Deinocerites cancer at the entrance to 

 crab-holes by the sea-shore; they are by no means as numerous as D. cancer and never 

 fly up and attack one, so are probably nocturnal like D. cancer, " I have never seen 

 C. secutor," says Dr. Grabham, " in that locality, C. secutor being an inland species." 



Description of Female, Male, and Larva of Culex janitor: 



Female. Proboscis rather long, subcylindrical, uniform, the labellae coni- 

 eally tapered; vestiture black, labellae paler; setos minute, curved, black, those 

 on labellae more prominently outstanding. Palpi small, slender, one-fourth 

 as long as proboscis, black, with a few outstanding setae. Antennae with the 

 basal joints somewhat shorter, rugose, pilose, black, the second joint slightly en- 

 larged ; tori subspherical, with a cup-shaped apical excavation, luteous, blackish 

 on inner side; hairs of whorls sparse, moderate, black. Clypeus rounded tri- 

 angular, doubly excavated at base, dark brown, nude. Eyes black. Occiput 

 brown, clothed dorsally with narrow, curved sordid-whitish scales in the middle, 

 darker on each side, and many erect, forked black ones ; the scales on lower part 

 of sides broader and white, the eyes narrowly white margined ; a row of black 

 bristles along margins of eyes. 



Prothoracic lobes elliptical, remote dorsally, clothed with whitish scales and 

 brown setae. Mesonotum brown, with two dorsal, impressed, paler brown lines 

 showing faintly on anterior half; vestiture of narrow, curved lustrous-brown 

 scales not obscuring the ground-color; bristles brown, numerous; a pair of 

 obscure oblique, pale, subdorsal lines. Scutellum trilobate, luteous, with pale- 



