21. TBICHOBHACB 39 



21. TRICHORHACHUS. 



ermediate betwi en Schiz >• and Eylotoma. 



Head modi antennae with the first two joints very 



• : the third I .d bifurcated in the male, the branches 



appearing almost to spring from the head, in consequence of the 



: The branches are clothed with long 



cilia light, and the outer one 



at the tip. Antenna* in the 



rt. Wings with one marginal appendicu- 



i8tigma is very large, and the 



h a manner that both the marginal 



cell . 1 and contracted at their 



1. pel not dilated; four 



hind tibiae with in; 



1. Trichorhachus australis. 

 II 1 /'.■'. i. pi. vii. fig. '2 



'( 18 . 

 Hab. V. 



Trichorhachus sobrinus. 



lin. 



. head below the antennaB, 

 and • i- : front I 



and • aisb above and pale 



ind infu I beyond the 



» * 



mid 



Trichorhachus hyalinus. 



I.) 



• • front tibiae and tarsi are 

 ; the wings are hyaline and 

 iridi 



River. -Mr. Du Boulay. 



1. Trichorhachus nitidus. 

 ,!'••. III. figs. 1 a- 2.) 



I ; d. 5 lin.. 1 .'-'. lin. 



I I - . ■ i and I lomen blue tish beneath ; 



