SO MYCETOPHILIDJE. 



Genus ALLACTONEURA, Meij* 



Allactomura, de Meijere, Tijd. Ent. L, p. 201 (1907). 



GENOTYPE, A. cincta, Meij., the original species. 



Head in profile oval, frons arched, with depressed line in middle. 

 Two distinct ocelli, remote from eye margins, and an indistinct 

 middle ocellus. Eyes broadly oval, face but slightly arched. 

 Antennae 16-jointed, as long as head and thorax together, tiagellar 

 joints cylindrical, longer than broad, closely sessile. Thorax not 

 deep, with setae posteriorly, elsewhere with scales and with oppressed 

 pile, as has also the abdomen ; scutellum with two long setse at 

 the apex. Abdomen somewhat depressed, slender, in both sexes 

 seven-segmented, in the male with a forceps hidden under the 

 7th segment ; in the female the 7th segment and the lamellae are 

 very small. Legs : coxae long and robust : all tibiae with several 

 ranges of setae ; spurs strong ; tarsal joints, particularly the 

 metatarsi, with numerous setulse. Wings narrow, without anal 

 angle. Costal vein ends just before tip of wing ; subcostal cross- 

 vein present, some distance before tip of auxiliary vein, the 

 latter ending at one-third of the wing. The 1st longitudinal vein 

 nearly straight, the 3rd begins near the subcostal cross-vein at a 

 very acute angle, nearly longitudinal, the basal portion in a straight 

 line with the rest of the vein. Anterior cross-vein placed 

 transversely, that is to sav, upright, near middle of wing, a little 

 before the fork of the 4th longitudinal vein. Marginal 

 (presumably) cross-vein present, joining the 1st and 3rd longi- 

 tudinals, placed nearly opposite the fork of the 4th vein.f The 

 5th vein forks at extreme base of wing, the branches detached ; 

 the 6th and 7th veins are absent, but a fold in the wing behind 

 the 5th vein (generally very distinct) appears, unless very closely 

 examined, like a 6th vein. 



Range. A. cincta, the only known species, was recorded originally 

 from Java, but it seems widely distributed in the East. 



Life-history unknown. 



43. Allactoneura cincta, Meij, (PI. I, fig. 17.) 



Allactoneura cincta, de Meijere, Tijd. Ent. L, p. 202, pi. v, figs. 2, 3. 



<$ . Head : vertex black, frons blackish, remainder of head 



reddish yellow or dirty brownish with blackish hairs ; palpi the 



same : antennal scape and about the basal third of the flagellum, 



* The description of the veins in Allactoneura is by the present writer, the 

 other characters being taken from de Meijere. 



t It is curious tluit de Meijere dues net mention tl;e very distinct (although. 

 yellow, in contradistinction to the dark brown anterior veins) cross-vein 

 between the 1st and 3rd longitudinal veins, placed nearly opposite the fork 

 of the 4th vein. Over a score of specimens have been examined by me 

 and it is distinctly obvious in all, if looked for ; also in an example identified 

 by de Meijere himself. It will presumably be the marginal cross-vein, but is 

 not always easily seen, from a prevailing tendency in this species for the wing 

 to curl up. 



