434 MonophlebincE. 



short and stout, with a few short hairs, second joint slightly shorter than first, 

 with two rather confused whorls of long hairs and some scattered short hairs ; 

 the remaining eight joints elongate, tri-nodose, a distinct whorl of long hairs 

 radiating from each node. Compound eyes very prominent, moruliform, 

 the facets rather widely spaced (see fig. 6). There is a large ocellus at the 

 inner angle of each eye. Legs rather long ; tibia slender, its distal extremity 

 recurved almost at right angles ^fig. 3) ; tarsus very slender, strongly bowed, 

 sickle-shaped ; claws relatively stout, distorted into various foi'ms (seeyf^. 4) ; 

 ungual digitules short and simple ; no tarsal digitules. Wings ample, trans- 

 versely and irregularly rugose between the nervures ; membrane (except costal 

 area) minutely aerolate. Halteres wrinkled, each with four stout, hooked 

 bristles on its truncate extremity {fig. 5). Dermal pores {fig. 7) relatively large, 

 quadrilocular (occasionally trilocular). Length of body (exclusive of append- 

 ages) 5 mm. Expanse of wings 12 mm. Length of antenna 6 mm. Length of 

 caudal appendages i mm. 



Described from a single example. Kandy, July. 



MONOPHLEBUS OUADRICAUDATUS, sp. nov. 

 (Plate CLXXIX.) 



Adult male {fig. i) dull brick red, pruinose ; mesonotal plates black. Wings 

 dull black, the interneural folds white ; reddish brown towards the base, the 

 extreme base hyaline. Legs, antennae, and eyes black. Caudal processes bright 

 red. Antennas ten-jointed ; basal joint stout (see fig. 7), with scattered short 

 hairs ; second joint narrower and slightly shorter than first, with some scattered 

 short hairs and two — somewhat confused — whorls of long hairs ; remaining 

 joints elongate, tri-nodose, with a distinct whorl of long hairs radiating from 

 each node. Compound eyes moderately prominent, the facets {fig. 3) strongly 

 convex. Wings ample ; coarsely rugose between the nervures. Halteres with 

 five stout, hooked bristles {fig. 2). Limbs well developed ; tarsus {fig. 4) 

 straight or slightly curved, about half the length of the tibia ; claw {fig. 5) long, 

 acutely pointed, ungual digitules small and simple, no tarsal digitules. Caudal 

 appendages (two on each side) wrinkled, hairy, with some longer and stouter 

 hairs towards their apices. Dermal pores {fig. 6) with a circular central orifice 

 surrounded by four opaque rounded cells. Length (exclusive of appendages) 

 4"5 mm. Expanse of wings ii'S mm. Length of antenna 6 mm. Length of 

 caudal processes 075 mm. 



Described from three examples, taken at Peradeniya, October, 191 1. 



