168 NEW YORK STATE MUSEUM 



Genus 29. Telmatogeton Schiner 

 Verb. zool. bot. ges. Wien. 16-93.1 :1866 



The larva and pupa have not been described as far as I am 

 aware, but figures of both are given by Schiner (1868) of an 

 East Indian species T . St. P a u 1 i Schiner. These figures 

 are reproduced on pl.34, figs. 12, 13, 14 and 15. 



Imago. Head small and deeply set; the thorax highly arched, 

 robust, rising abruptly behind the head; the abdomen is short 

 and slender ; the wings long and of uniform width, extending far 

 beyond the abdomen; the legs are much elongated. Eyes oval, 

 in both sexes widely separated by the deeply excavated front; the 

 ocelli are wanting; palpi 4-jointed, the basal joint small, the fol- 

 lowing ones of equal length., thickly haired; antennae in both 

 sexes alike, 7-jointed, scarcely as long as the head, the first joint 

 extraordinarily large and thick, the second one slender, the next 

 four disklike, much wider than long, closely joined, the apical 

 joint elongated, somewhat thickened at the base, gradually becom- 

 ing smaller towards the tip; the basal joint hairy aibove and 

 below, the others bare. Metathorax strongly developed; the 

 scutelluni small; abdomen 7-jointed; male genitalia two-lobed, 

 the lobes closely connected, not spreading or forceps-like ; oviposi- 

 tor of the female pointed ; the upper sheath longer than the lower 

 one. Legs long and slender, particularly the hind pair. At the 

 end of each of the tibiae is a pair of short spines, and at the apical 

 end of the metatarsus is a single one; the metatarsus is elongate 

 the second joint scarcely one half as long as the first, the third 

 less than two thirds as long as the second, the next two each half 

 as long as the third; the claws horny, well-developed, furcate at 

 the extreme tip ; pulvilli small but well-developed ; the empodium 

 large, filling the space between the claws, ciliated at the apical 

 end. Wings long, the anal angle right-angled, the posterior mar- 

 gin nearly parallel with the anterior margin; the subcostal vein 

 running parallel to the costa but not reaching the margin; the 

 cubitus forks proximad of the middle of the wing, its lower branch 

 not quite reaching the margin, anal veins quite short (pl.34, 

 fig.16) . Halteres long with a broad knob. The type of the genus 

 is T. 'St. Pauli Schiner (loc. cit). A small blackish fly with 

 dusky wings from the Island of St Paul in the Indian Ocean. 



