136 ENTOMOLOGISK TIDSKRIFT 1 



oriunda, usque ad apicem praefurcae leviter curvata, dein mar- 

 ginem anteriorem alae versus late et sat alte arcuata; vena 

 axillari dimidio basali venae anali valde approximata et cum ea 

 parallela, exin subito ad marginem alae obtusangulariter decur- 

 rente; vena transversa majore paullo pone basin ceilulae discoi- 

 dalis apertae suffixa; cellulis posticis tribus. Halteres flavidi. Pedes 

 longissimi, lutei (saltern postici, anteriores desunt), femoribus 

 annulo apicali, tibiis summo apice tarsisque apicem versus fuscis; 

 tibiis posticis nonnihil ante apicem spinulis duabus longiusculis, 

 tenuibus, nigris, aliquantulum distantibus et altera supra alteram 

 posita armatis. Abdomen totum cum propygio fusconigrum. 

 Long, o 71 corp. 6,5 mm., alae 6,8 mm., ped. postic. 26 mm. 



Caffraria. Etiam ad sinum Delagoa volitat, unde accepit 

 D. von Roder. 



The structure of the propygium is tolerably well visible in 

 the specimen before me. It consists on each side of a stout 

 basal piece, bearing at the end a claw-shaped appendage, directed 

 against the upper side of the basal piece as the half-folded blade 

 of a pen-knife. In the lieving insect they may, however, appear 

 otherwise. The straight style under and between the basal pieces 

 is very conspicuous. This species is no doubt congeneric with 

 Limnobia Trentepohli Wied., an insect upon which Bigot founded 

 the genus Trentepohlia. It has also the principal characters of 

 the genus Mongoma Westw., but there is no reason for not 

 accepting Biogt's name, this being older than the one given by 

 Prof. Westwood. In T. fragillima Westw., and, according to 

 Osten Sacken, also in T. tenera O. S. and pennipes O. S., the 

 fore femora are armed with two spines near the base. I am 

 unable to say if these spines "be present in T. exornata, as the 

 fore legs are wanting in the specimen now before me; but the 

 hind tibiae of exornata have two such spines on their apical 

 portion. The hitherto described species of the genus TrentepoJilia 

 may be tabulated thus: 



1 (6) Ramus posterior venae praebrachialis furcatus. Ceilulae 



posticae quattuor. Cellula discoidalis clausa. Tarsi albi. 



2 (3) Tibiae intermediae apice utrinque breviter albofimbriatae. 



— Borneo. pennipes O. S. 



