180 Journal New York Entomological Society, t^oi. xxiii. 



XIPHODIPLOSIS new genus. 

 This genus is easily distinguished from all of the trifili having 

 triarticulate palpi, by the enormously produced, somewhat sword- 

 shaped terminal clasp segment. Owing to its habits it is provision- 

 ally associated with Diadiplosis Felt, though it may fall in the series 

 with Kalodiplosis Felt, since the material at hand has not enabled 

 use to ascertain the structure of the claws. The type of this species 

 is X. fulva n. sp. 



Xiphodiplosis fulva new species. 



The midges were reared August 15, 1914. from Saissetia nigra 

 on dahlia by Prof. A. Rutherford, Royal Botanic Gardens, Pera- 

 deniya, Ceylon. 



Larva. — Length 1.75 mm., stout. Head short, broad, the antennae 

 moderately short, stout, biarticulate ; breastbone dark brown, expanded 

 apically and strongly tridentate. Skin smooth, posterior extremity broadly 

 rounded and rather deeply incised. 



Male. — Length i mm. Antennae probably as long as the body, sparsely 

 haired, light brown ; probably fourteen segments, the third and fourth 

 slightly fused, the fourth having the stems with a length one and one-half 

 and three times their diameters, respectively ; basal enlargement subglobose, 

 distal enlargement elongate, pyriform, with a length fully twice its diameter 

 and a slight constriction near the basal third. The loops of the three cir- 

 cumfili rather numerous, moderately stout and extending nearly to the apex 

 of the adjacent portion of the stem; terminal segment missing. Palpi: 

 first segment irregular, the second with a length about three times its diameter, 

 the third as long as the second, somewhat dilated. Eyes holoptic. Mesono- 

 tum, scutellum and postscutellum fuscous yellowish brown. 



Abdomen yellowish brown. Wings hyaline. Halteres pale yellowish. 

 Coxae and femora yellowish. Genitalia : basal clasp segment relatively short, 

 stout, with a length about one-half greater than its diameter and a large, 

 triangularly obtuse lobe at the internal basal angle ; terminal clasp segment 

 greatly produced, slender, slightly curved and with a length about twice 

 that of the basal clasp segment ; dorsal plate long, slender, deeply and nar- 

 rowly incised, the lobes relatively slender and narrowly rounded apically ; 

 ventral plate longer than the dorsal plate, moderately broad and narrowly 

 rounded apically. 



Type Cecid. 32590. 

 Arthrocnodax rutherfordi new species. 



The midges described below were received from Prof. A. Ruther- 

 ford, Royal Botanic Gardens, Peradeniya, Ceylon, under date of 



