BY ARTHUR WHITE. 91 



yellow, the abdcniinal bristles black instead of yellow, the 

 biistles of the tibise entirely black instead of mostly yel- 

 low, and veins of wing.% black instead of light brown. 



This description is taken from a sj^ecimen kindlv sent 

 me for examination by Mr. Spry. Other specimens are 

 m the collection of the British Museum. 



T R I c H o 1 T A M us, (Jen. nor. 



' This genus is proposed for the species previously 

 placed in the genus iJi/x/iiarJiiis (D. ru(li.<<, WJl-.), but which 

 the structure cf the ovipositor shows does net belong to 

 that genus. It may be characterised as follows: — 



Thoracic bristles long on the anterior as well as the 

 posterior half; abdomen with lateral bristles; ovipositor 

 laterally compressed, and with the terminal lamellte free. 



Face bearing a large bushy moustache, which readies 

 almost to the base of the antennse. Antennte with the 

 first ioint twice the length of the second, the third slender, 

 nearlv twice as long as the lirst two together, and provided 

 with a thin style, which is about half its length. Thorax 

 bearing long dense bristles, which are long on the anterior 

 as well as the posterior half. Scutellum with two long 

 marginal bristles. Abdomen long and slender, with lateral 

 hindmarginal bristles. Genitalia of the male lengthened, 

 about the same breadth as, or a little broader than, the 

 previous abdominal segment. Abdomen in the female con- 

 sisting of seven segments, and a latcrallv compressed ovi- 

 po«itor. tho latter having the terminal lamella? free, the 

 total length of the ovi]5ositor being about equal to that of 

 ■ 'i two preceding abdominal segments top^ethcr. Lees 

 liairy and bristly, both femora and tibi;e Ijearing bristles. 

 Wings with the ordinary venation of y loitomnx. 



Of this genus only a f ingle species, T. rudis. Wall-., is 

 at present known. It occurs commonly in both New 

 ^outh Wales and Tasmania, and doubtless also in Victoria. 

 It is fully described in both Miss Eicardo's Revision of the 

 Australian Asilidfe, and in my Diptera-Brachycera of Tas^ 

 Ti:ania, Part III. 



N E o I T A M u S, O.'if-Sar/,-. 



The species remaining in this genus, even after remov- 

 ing the small brownish species with striped femora, which 

 I have placed in a new genus, Eliahdofnitamua, are not 

 quite a homogeneous group. The three species, N . hi/ali- 

 prnnifi, X. vit/f/afus', and X. flaririnrtnx, are fairly typical 

 of the genus as applied to Palsearctic and Nearctic species, 

 although in none of these is the sixth abdominal segment 

 included in the ovipositor, whilst the third species named 



