chamberun: iitriopoiu of the ltjstraliah region. 2] 

 than contiguous region. Anterior and median legs fulvous, posterior 



ones somewhat darker; first tour articles of antennae green, the others 



fulvous. 

 Nearest E. ptatycephaltu (Newport) and E. spinonu (Newport). 



Antennae consisting of twenty articles; articles Longer than wide. 

 Differing from the two species mentioned in having the sulci of the 

 Stemites sharply impressed from the second segment to the twentieth. 

 Last ventral plate with hut weak traces of a median sulcus; caudal 

 margin deeply excavated. Coxosternal plate with 3 + 3 teeth or 

 with a stunted fourth tooth on mesal side of each series, teeth 

 bluntly rounded, not subdivided, presenting a characteristically differ- 

 ent appearance from the species mentioned. Paired dorsal sulci 

 beginning on third tergite but faint on this and the fourth plate. 

 Coxopleural processes exceeding the last ventral plate by about the 

 length of the latter or somewhat more; two apical points and one lat- 

 eral and one dorsal spine. None of legs with two tarsal spines in 

 type; nineteenth and twentieth with none. Femur of anal legs below 

 with two spines in outer row, two in inner, two on mesal surface and 

 two on dorsomesal edge, the distal dorsal process with a single point. 

 Length, 125 mm. 



46. Ethmostigmus platycephalus (Newport). 



Heterostoma platycephala Newport, Trans. Linn. soc. London, 1845, 19, p. 415. 

 Heterostoma platycephala + var. lugubre Haase, Abhandl. Mus. Dresden, 1887, 



5, p. 92. 1 

 Heterostoma brownii + var. gracile Haase, Ibid., p. 94. 2 

 ? Heterostoma viridipes Pocock, Ann. mag. nat. hist., 1891, ser. 6, 7, p. 56. 3 

 Heterostoma loriae Silvestri, Ann. Mus. civ. Genova, 1894, 34, p. 631. 4 

 Heterostoma platycephalum Attems, Semon's Forschungsreise, 1898, 5, p. 509. 3 

 Ethmostigmus platycephalus Pocock, Willey's Zool. results, 1898, pt. 1, p. 62. 6 



Pocock, Ann. mag. nat. hist., 1898, ser. 7, 1, p. 327. 7 Ribaut, Abhandl. 



Senckenb. gesellsch., 1912, 34, 284. 8 Attems, Bijdr. dierk., 1915, 20, p. 4. 9 



Localities. — New Guinea: 5 Jobi, 1 Dore, 1 Moroka. 4 Kei Islands: 

 Great Kei. 8 New Britain. 2 ' 6 Hermit Island. 1 ' 2 Halmaheira. 1 Ter- 

 nate. 3 Ambon. 9 Ellice Islands: Rotuma. 7 Society Islands: Ta- 

 hiti. 1 L'nion Islands: Atafu (Duke of York) Island. 6 



47. Ethmostigmus pygomegas (Kohlrausch). 



Heterostoma pygomegas Kohlrausch, Archiv naturg., 1881, 47, p. 63. 

 Heterostoma rapax Attems, Semon's Forschungsreise, 1898, 5, p. 509. l 



Locality. — New Guinea. 1 



