PROM THE INDIAN AUCHIPELJlGO. 151 



with three abbreviated keels, the keel on each side curved and very 

 remote from the middle one ; face keeled. Prothorax with one keel, 

 more than four times as broad as long. Mesothorax with five 

 keels, the keels on each side diverging from the middle one. Legs 

 testaceous ; hind legs striped with piceous. Wings dark brown, 

 slightly translucid. Fore wings with some transverse veins in the 

 disk, and with two exterior complete lines of transverse veins ; of 

 these the second line is more regular than the first ; marginal veins 

 forked at the tip and along the subapical part of the costa. Hind 

 wings with one irregular line of transverse veins; some of the 

 marginal veins forked. Length of the body 2 lines, of the wings 

 6 lines. 

 Hob. Morty. 



1/9. RiCANiA iMPERviA. Mas. Nigra, capite margine testaceo ca- 

 rinato, vertice brevissimo, fronte transversa septemcarinata, pro- 

 thorace arcuato unicarinato, scuto tricarinato, scutello unicarinato, 

 pedibus testaceis, alis latis nigro-fuscis, alis anticis venis plurimis 

 longitudinalibus lineisque tribus e venis transversis. 



Male. Black. Head with a testaceous prominent border ; vertex very 

 short ; front broader than long, with seven slight keels, of which 

 the three on each side are incomplete. Prothorax arched, four 

 times as broad as long, with one keel. Scutum of the meso- 

 thorax with three keels, the keel on each side diverging hindward 

 from the middle one; scutellum with one keel. Legs testaceous"; 

 coxae black. Wings broad, blackish brown, with a bluish bloom be- 

 neath. Fore wings with very numerous longitudinal veins; three 

 lines of transverse veins, of which the first is irregular, the second is 

 slightly undulating, and the third is nearly straight; transverse 

 costal veins numerous, some of them forked. Length of the body 

 3^ lines, of the wings 10 lines. 



Hab. Gilolo. 



180. RicANiA DENSA. Mas. Nigra, fronte tricarinata piceo margi- 

 nata, facie picea non carinata, prothorace unicarinato, mesothorace 

 quinquecarinato, pectore ventreque piceis, pedibus testaceis, alis 

 anticis piceo-nigris venis marginalibus non furcatis, alis posticis 

 fuscis subhyalinis. 



Male. Black. "Vertex extremely short ; front very much broader than 

 long, piceous on each side and in front, with three abbreviated keels, 

 of which the keel on each side is slightly curved and very remote from 

 the middle one ; face piceous, not keeled. Prothorax arched, with 

 one keel. Mesothorax with five keels, of which the inner pair diverge 

 from the middle one hindward, and are there united to the outer pair. 

 Pectus and abdomen beneath piceous. Legs testaceous. Fore wings 



11* 



