GOELDIA 185 



posterior border ; dorsal tuft of two long hairs on each side ; lateral hair single, 

 long,_arising from an angle in the plate ; subventral tuft of two long hairs aris- 

 ing from the corner of a small ventral plate that runs across to the tuft on the 

 other side. Anal gills twice as long as the segment, stout, with rounded tips, 

 the upper pair very slightly weaker than the lower pair. 



The larvge live in similar locations to those of Johlotia digitatus. The eggs 

 are laid singly. We abstract from Mr. Busck's remarks : 



" Bred commonly together with J. digitatus. The eggs are laid singly on the 

 surface of the water. They are elliptical, bl?.ck, with four longitudinal fringes 

 of short white hairs from tip to tip. The larva issued from one end. In a bam- 

 boo-joint, which I prepared and filled with water at 5 o'clock on the evening of 

 May 1, 1 found the next morning at 9 o'clock some twenty such eggs, kept float- 

 ing on the surface by the hair fringes. Some of these eggs were submerged dur- 

 ing transit, and with the fringes once wet remained under water. They hatched, 

 nevertheless, together with the non-submerged eggs, during the afternoon of the 

 same day. The young larvas were white, with black hairs. They remained under 

 water for several hours, eating of the vegetable matter at the bottom. The next 

 morning they had doubled in size, and on the third day attained their full size. 

 They came regularly, though not very frequently, to the surface to breathe. 

 When feeding on the bottom they would lie in the soft residue of vegetable matter 

 in different positions. The first adult issued May 14. The adults of this and 

 the other species of Johlotia are conspicuous objects in the bamboo woods, when 

 they approach to bite, gracefully floating their long, white-tipped middle and 

 hind legs." 



The adults " approach to bite," but it is doubtful if they ever do so, or at least 

 commonly. 



Panama. 



Tabemilla, Canal Zone, larvse in bamboo-joints, eggs May 1, adult issued May 

 14, larvas May 3, 5, 9, pupas May 22, 1907 (A. Busck). 



The development of this species is remarkably rapid, far exceeding that of 

 Johlotia digitatus. 



UNIDENTIFIED GENERA. 



Genus GOELDIA Theobald. 



Goeldia Theobald, Mon. Culic, iii, 330, 1903. 



The type species is Goeldia fluviatilis Theobald, sole species originally included. 



Origin Ai. Description of Genus Goeldia: 



Head clothed with flat scales; mesothorax with flat spindle-shaped scales and 

 larger narrow-curved ones, lanceolate in form before the scutellum; scutellum with 

 flat scales; metanotum with chaetae and squamae. Palpi in the ^^ nearly one-third 

 the length of the proboscis, in the $ quite small; proboscis short and thick, not as 

 long as the body. Wing scales like Runchomyia, dense and elongated, ending 

 asymmetrically; the cross-vein in the (^ as in Culex; in the 5 the mid and super- 

 numerary not united, the posterior as in Culex. 



This genus is founded on a c? specimen; the female described here bears such a 

 strong general resemblance that I have included it under this species. 



It differs from Sabethoides notably in its Culex like venation. 



Original Description of Goeldia fluviatilis : 



(^. Head covered with flat grey scales, with dull violet reflections, a pale spot in 

 front and paler round the eyes and at the sides; near the nape are some black upright 

 forked scales, forming a rough line much as in /. lunata, Theobald; palpi about 

 one-third the length of the proboscis, completely covered with deep violet scales, so 



