514 M08QTJIT0E8 OF NORTH AMERICA 



Prothoracic lobes dark brown, remote, with pale-golden scales on upper 

 side and a few black bristles. Mesonotum bright brown, nearly bare in places, 

 clothed with narrow, curved pale-golden and small bronzy brown scales in 

 patches, dorsally two narrow, bare impressed lines, at sides of ante-scutellar 

 space a broad, bare, bright brown patch, ante-scuteUar space and lighter brown; 

 anteriorly a median stripe of golden scales which spreads into the lateral dark 

 area before the middle, ante-scuteUar area surrounded by pale-golden scales, a 

 short line of golden scales before the roots of the wings, extreme lateral margin 

 golden scaled ; rather numerous long, bright brown bristles with blackish tips. 

 Scutellum distinctly trilobate, with narrow pale golden scales, each lobe with 

 long brown bristles. Postnotum elliptical, prominent, brown, nude, slightly 

 prainose. Pleurae and coxae pale brown mottled with blackish, clothed with 

 groups of dark bristles, some patches of white, flat appressed scales in the middle 

 of the pleurae. 



Abdomen subcylindrical, somewhat flattened dorsally, the tip rather squarely 

 truncate; dark brown, clothed above with blue-black scales and with a row of 

 golden bristles at tip of each segment which are most numerous on last segment; 

 a series of large roughly triangular, lateral patches of pure white scales at bases 

 of segments; venter clothed with black and yellowish scales intermixed, the 

 black predominating, the yellowish scales forming irregular, narrow basal bands. 



Wings hyaline, rather broad, veins slightly brownish ; petiole of 3econd mar- 

 ginal cell considerably shorter than the cell; that of second posterior cell also 

 shorter than its cell; basal cross- vein more than its own length distant from 

 anterior cross- vein; vestiture of dense, narrowly ovate and broader obliquely 

 truncate scales, dull brown, a few creamy white ones at bases of costa and first 

 vein, some pale scales at bases of fork-cells and at cross- veins; fringe black. 

 Halteres white. 



Legs slender, rather long, clothed with black scales ; femora irregularly pale- 

 yellow scaled below near base and with a series of white spots, a narrow white 

 ring before tip and a white apex; tibiae black, with series of irregular yel- 

 lowish-white spots, tips white, the hind pair with a long white mark on under 

 side beyond middle ; hind tarsal joints with narrow shining-white rings which 

 involve both ends of joints, the last joint white at base only ; fore and mid tarsi 

 white ringed at base and apex of first two joints and at base of third, terminal 

 joints entirely dark scaled. Claw formula, 0.0-0.0-0.0. 



Length : Body about 5 mm. ; wing 4 mm. 



Dr. Goeldi makes the following observations on the life history and habits : 



Females were captured and deposited eggs. About one in seven specimens 

 captured laid eggs. The eggs are deposited in ribbon-shaped masses, consisting 

 of a double row about 60 eggs long, the eggs placed upright as in the egg-rafts 

 of Gulex. The masses are slightly curved toward the upper side. The females 

 all died soon after ovipositing. The larvae hatched in about five days. The 

 single eggs measure 0.68 mm. in length and 0.14 mm. in width. The shape is 

 cylindrical, most pointed at the upper end. The larvae hatch from the lower end, 

 the end being detached in the form of a circular lid. The egg is covered with 

 relatively large transparent granules. The color is dark brown. The larva in the 

 first stage is Uke that of Mansonia perturbans, with very long antennae, the tip 

 greatly drawn out, causing the apical spines to be much separated, the hair 

 towards the base ; lateral comb of the eighth segment of few spines in a single 

 row ; air tube bottle-shaped, the outer half very slender and furnished with a 

 crown of spines at the tip. Dr. Goeldi was unable to feed the larvae ; undoubtedly 

 they live at the bottom of swamps, attached to the vascular roots of aquatic vege- 

 tation, in the manner of Mansonia perturbans and M. titUlans. The imagines 



