ERIC MJ ÖBERG, ISOPTERA. 91 



Key 

 io ihe soldiers of the 8 different Australian M ir oterm es-species. 



I. Frontal process very small more or less rudimentary . • 1. 



M. krisiformis Frogo. 

 Distribution: N. S. Wales. 



II. Frontal process very well developed. 



A. Frontal process directed upwards. 



a. Species of moderate size ; frontal process very sharp, strongly 

 directed upwards (Plate 2, Fig. 1) 2. 



M. Maideni Mjöb. 

 Distribution: N. Queensland. 



b. Very large species, frontal process not very strongly directed 

 upwards • . . . 3. 



M. Harrisi Mjöb. 



Distribution: N. Queensland. 

 (Plate 2, Fig. 2.) 



B. Frontal process directed more forwards or only the extreme tip 

 pointing upwards. 



a. Frontal process very long and sharp. 



1. Head long, frontal process long 4. 



M. Cheeli Mjöb. 

 Distribution: N. Queensland. 

 (Plate 2, Fig. 4, Text Fig. 46, 47.) 



2. Head shorter, frontal process shorter (Text Fig. 48, 49), length 

 of head 5. 



M. Alleni Mjöb. 



b. Frontal process stout and more obtuse or smaller. 



Frontal process stout, more obtuse 6. 



M. broomensia Mjöb. 



Distribution: N. W. Australia. 

 (Plate 2. Fig. 3, Text Fig. 50.) 



2. Frontal process small, pointing upwards at the extreme tip. 

 *. Labrum slightlj^ produced at the anterior angles .... 7. 

 M. alicensis Mjöb. 

 Distribution: Alice River, N. 

 Queensland. 

 (Text Fig. 51, 52.) 



*. Labrum not produced at the anterior angles (see Silvestrt, 



1. c, Taf. XIX, Fig. 133—135) 8. 



M. Krcepelini Silv, 



