150 DR. E. BERGEOTH ON STRIDULATIMG [May 16, 



16. OxcocoRis SUBSIMILIS Moiit. Victoria. 



0. subsimilis Mont. Bull. Soc. Sc. Bucarest, xii. p. 293 (1903). 



17. Oncocoris transversus Carp. Murray Isl. 



Dictyotus transversus Carp. Proc. Roy. Dublin Soc. vii. 

 p. 138, pi. xii. f. 1 (1891). 



18. Oncocoris truncatellus Walk. Australia. 

 Eysarcoris truncatellus Walk. Cat. iii. p. 558. 



Dictyotus truncatelhts Dist. Ann. & Mag. N"at. Hist. (7) iv. 

 p. 434 (1899). 



19. Oncocoris ventralis Walk. North Australia. 



Mormidea ventralis Walk. Cat. iii. p. 555. 

 Dictyotus ventralis Dist. Ann. & Mag. Nat. Hist. (7) iv. 

 p. 434(1899). 



The species of Oncocoris are very similar in fades to those of 

 Dictyotus, but, apart from the stridulatory patches, are easily 

 distinguished by having the antenniferous tubercles visible from 

 above and the metasternal orifice prolonged in a keel. 



Before proceeding to describe some new forms of this group, 

 I may remark that in Oncocoris and Comniius the ^' spicida 

 stridulatoria " are arranged in a single straight row, whilst in 

 Platycoris and Niarius they are placed in two or three irregular 

 rows. The other described genera of the group are unknown 

 to me. 



Niarius tryoni, sp. n. 



Ovatus, opacus, niger, subtiliter sat dense piinctulcttus, supra 

 calltdis mimttis Jlavidis conspersus, intta suj^e^'iore posteriore 

 et tnargine angusto laterali capitis, bast hujus sabtus, basi 

 articidi primi, tertii quartique antennarurn, rostro {articido 

 idtimo excepto), limbo laterali prothoracis et jxcrtis basalis 

 corii, epipleuris, 'macida prope angidos basales et apice 

 scutelli, 7nacida oblonga laterali intus rotundata segmentorumi 

 abdominaliuin, acetabxdis 2^^dibusque {anmdo anteapicali 

 femorum excepto) fiavo-ocliraceis, ventre medio ir}ipunctato, 

 dilute piceo, nitido. Artictdus pri^mts antennarurn ajncem 

 capitis Jiaud attingens, secundus duobus tdtimis unitis 

 ceqtiilongus, tertius et quartus subceque longi. Pronotum 

 lateribus leviter sinuatum. Scutellum apice im2)unctattim. 

 Hemelytra ap)icem abdominis attingentia, corio basin segmenti 

 sexti connexivi superante. Segmentum genitale maris medio 

 segmentis tribus prcecedentibus unitis sid)ceqttHongum. {Pedes 

 postici desunt.) 



Long. cJ 10 mm. 



Queensland. 



Allied to jV. illuminatus Dist., but in Distant's species the 



