\'oI. XXV] KN'TOMOLOGICAL N'KWS 35I 



The Neotropical Tipulidae in the Hungarian 

 National Museum (Diptera). — IV. 



By Chas. r. Ai.KXAXiiF.K, Ithaca, New York. 



(Plate XV.) 



Sulvfamily TIPULIX.\R, Tribe Tirui.iNi. 

 Genus Macromastix Ostcn S.ickon. 

 Macromastix pygmaea sp. n. (PI. XV. fig. 1). 



Size small (wing of $ about 10.5 mm.); wings with /?2 obliterat- 

 ed ; halteres vcrj' long and slender. 



jl/a/c— Length S mm.; wing. 10.3 mm.; antennae about 0.5-10 mm. 

 Palpi dark brown; frontal prolongation of the head brown, an- 

 tennae a little longer than the body, the flagellar segments being great- 

 ly elongated, antennae densely clothed with rather short delicate 

 hairs; fore part of the vertex produced into a prominent conical 

 tubercle; front and vcrte.x gray, occiput brownish. 



Mesonotal praescutum light brown somewhat darker in front and 

 on the sides, but without apparent stripes; scutum with the loI)es 

 brown; scutellum and postnotum light brownish yellow. Pleurae, 

 mesopleurae darker brown than the yellowish metapleurae. Halteres 

 very long and slender, yellowish at base, the remainder brown. 



Legs, coxae and trochanters dull yellow; femora dull yellow bas- 

 ally soon passing into brown; tibiae and tarsi brown. 



Wings subhyaline, cells C and Sc more yellowish; stigma scarcely 

 indicated; veins brown. Venation. Rs very short, R2 obliterated 

 (See Plate XV. figure i). 



Abdomen with the two basal segments light brown: remainder of 

 abdomen dark brown ; hypopygium simple. 



Holotype. — ATale, Callanjja, Peru, in the Huns^arian Na- 

 tional Miisenm. 



The reference of this species to Macrnmasfix is somewhat 

 provisional. It agrees with M. rhilcnsis Philippi' in its antennae 

 and simple hypopygium, hut the obliteration of vein R2 is a 

 character suggesting certain of the DoUchnpczini. T do not 

 care to erect a new genus upon a single specimen. .As T liavc 

 shown before,^ Enderlein's M. appendens (Zool. Tahrh., Yn\. 

 32, pt. I, pp. 14, 15) is not a Macromastix at all, but a true 

 Tipula. 



'Philippi. Verb. Zool. hot. Gescll. Wicn. Vol. 15. p. 617 (1S65). 

 'Alexander, Ann. Ent. Soc. Am., Vol. 5, No. 4, p. 355 (1912). 



