COLLECTED IN BORNEO. 107 



hexagonal, about twice longer than broad; veinlet between the 3rd externo- 

 medial vein and the subanal near the base of the discal areolet. 



10. Limnobia aegento-cincta, n. s., fcem. Nigra, antennis verticillato- 

 pilosis, thorace nitido, abdomine fasciis argenteis, femoribus subclavatis, 

 ahs cinereis venis nigris nebulosis. 



Female. Black. Antennae verticillate-pilose. Thorax shining. Abdomen 

 with silvery bands. Femora subclavate. Wings grey ; veins black, slightly 

 clouded with black. Length of the body 3£ lines ; of the wings 6 lines. 



Gen. Pteeocosmtjs, Walk. 



Limnobia leucotehis and L. plecioides, p. 6, and other species, may be placed 

 in this genus ; the structure of their wing-veins differs somewhat from that 

 of Meigen's Div. 1. 



11. Pteeocosmtjs ltjntg-eetjs, n. s., mas. Ater, pedibus piceis, alis violaceo- 

 nigricantibus apice testaceis macula discali sublunata alba. 



Male. Deep black. Legs piceous. Wings black, with violet reflections, 

 testaceous at the tips, and with a white slightly curved discal white spot. 

 Length of the body 5 lines ; of the wings 8 lines. 



12. Pteeocosmtjs ineixtjs, n. s., mas et fcem. Niger, thorace ferrugineo, 

 abdomine antico flavescente, vitta viridi, pedibus ferrugineis, femoribus 

 tibiisque apice tarsisque nigris, ahs violaceo-nigricantibus fascia brevi discali 

 maculaque subapicali albis. Fcem. Abdominis segmentis posterioribus ni- 

 gris fulvo marginatis, terebra ferruginea\ 



Male and Female. Black. Thorax and legs ferruginous. Abdomen to- 

 wards the base yellowish, and with a green stripe. Tarsi and tips of the 

 femora and of the tibia? black. Wings blackish, with violet reflections, 

 adorned with a short white discal band and with a subapical white spot. 



Female. Hinder segments of the abdomen black, with tawny borders; 

 oviduct ferruginous. Length of the body 5-6 lines ; of the wings 10 lines. 



13. Pteeocosmtjs optabilis, n. s., mas. Ater, abdomine luteo basi fasciaque 

 lata postica atris, pedibus piceis, alis nigricantibus apice subcinereis fascia 

 brevi discali alba. 



Male. Deep black. Abdomen luteous, black at the base, and with a broad 

 black posterior band. Legs piceous, very slender. Wings blackish, with 

 violet reflections, greyish hyaline at the tips, with a limpid mark by the 

 interior angle, and with a short white discal band. Length of the body 

 3 lines ; of the wings 6 lines. 



14. Pteeocosmtjs combinattjs, n. s., fcem. Saturate rufo-ferrugineus, capite 

 nigro, abdomine fascia antica testacea, terebra pedibusque pallide fulvis, 

 ahs violaceo-nigricantibus guttis costalibus et marginahbus macula discali 

 lunulaque subapicali albis costd testacea. 



Female. Deep reddish ferruginous. Head and antennae black. Abdomen 

 with an anterior testaceous band. Oviduct, legs and halteres pale tawny. 

 Tarsi blackish towards the tips. Wings blackish, with violet reflections, 

 with a few marginal white dots, with two white spots (one discal, the other 



