584 STUDIES IN AUSTRALIAN ENTOMOLOGY, NO. Xll., 



Want of knowledge of Perileptus prevents settlement of this 

 matter by me. 



Pyrrotachys constricticeps, SL, is evidently a Trechid (as Peri- 

 leptus is also now regarded) rather than one of the Subulipalpi. 

 It may appropriately be separated from the other Irechides by 

 the eyes contiguous to the mouth beneath, and the Bembidium- 

 like apical joint of the palpi. Mr. Blackburn's genus Trechodes 

 (including Bemhidium bi^mi'titum, MacL, which I have ascertained 

 from inspection of the type is not a Bembidiid) comes into the 

 group Perilejytides. 



Subtribe Melisodei'ldes. 



I formerly considered the Melisoderides a group of the tribe 

 Nomiini (Horn),* but this now appears to me very doubtful; 

 besides, it is evident from Horn's treatment of his tribe that 

 Nomiini was the wrong name to have used, and that CosciQiia, an 

 older genus, should have given the name to the tribef. In any 

 case, I do not know the exact date of Nomius (Castelnau, Etud. 

 Ent.), but Melisodera, Westwood, (1835) cannot be of much later 

 date. M. Tschitscherine would evidently consider the genera 

 forming the sul)tribe Melisoderides as part of his Drimostomini,% a 

 subtribe of Platysmatiiri: but I think the Meonides, Melisoderides 

 and Amblytelides should be removed from the Platysmatini on 

 account of the mandibles having a seta in the outer scrobe of 

 the mandibles. The typical Melisoderides are in fact Morionides 

 with the scrobe of the mandibles setigerous. 



N'ote. — In view of the very high importance, from a classifica- 

 tory point of view, attributed to the marginal seta? of the pro- 

 thorax in Mecyclothorax and allies b}' Dr. Sharp, it seems 

 advisable to offer the following information as to this character 

 in Australian allied genera from an examination of all the species 

 in my possession: — Prothorax with each lateral margin (1) 



* Proc. Linn. Soc. N.S.W. 1S98, xxiii. (Pt. 3), p. 470. 



t Vide Trans. Am. Ent. Soc. ix. ISSl, pp. 1-29-130. 



X Hor. Ent. Ross. xxxv. 1902, p. 508. 



