106 



ARKIV FÖR ZOOLOGI. BAND 12. NiO 15. 



Text Fig. 56. 

 Antenna of 

 imago of Mi- 

 crocerotermes 

 excisus Mjöb. 

 n. sp. 



right one with two sharp apical teetb, a sharp 



edge below and a broad, not projecting basal 



part; antennse fuscous, 14-jointed,^ basal joint 



darkest, nearly twice as long and twice as broad 



as 2nd, 3rd very short, 4th twice as long as 3rd, 



5th and following longer, rounded, but not twice 



as long as broad, 14th oval; prothorax of very 



characteristic shape, not quite twice as broad as 



long, broadly emarginate at the front margin, 



slightly excised in the centre, anterior angles 



broadly rounded, tapering strongly backwards, 



the whole upper snrface thickly covered with 



long hairs, with light median line, deeply excised 



in the middle of the hind margin, meso- and me- 



tathorax longer, flattened ; wings greyish-f uscous, 



venation variable; mediana running through the 



middle of the wing, sending out a variable num- 



ber of forked or unforked branches; cubitus 



with 10 — 12 oblique nervures, legs of moderate 



size, tighs fuscous with darker tips of femora, thickly hairy, 



claws long; abdomen with parallel sides, thickly hairy, with 



10 dark fuscous chitinous dorsal plates; 



chitinous plates on the ventral side in- 



terrupted in the centre; cerci small. 



Measurements: Length of body 

 with wings 8,5 mm, length of body 

 without wings 5,2 mm, length of head 

 0,8 7 mm, breadth of head 0,8 9 mm, length 

 of prothorax 0,42 mm, breadth of pro- 

 thorax 0,76 mm, length of forewing 8,4 

 mm, breadth of forewing 2,2 mm, length 

 of hindwing 8 mm, breadth of hindwing 

 2,5 mm, breadth of abdomen 1,0 6 mm. 

 Soldier (Fig. 57). Very like the sol- 

 dier of M. Turneri Frogg. but head more 

 reddish in colour and more rounded, not 

 quite so truncate in front, 3rd and 4th 

 Text Fig. 57. Head of sol- jqjj^^ j^^^ showing anv tendency to coalesce 



dier of Mtcrocerotermes '' t=> j j 



excisus Mjöb. n. sp, together. 



^ According to Froggatt (1. c, p. 738) the antennse of the imago of 

 M. Turneri Frogg. has only 13 joints, but undamaged specimens of the 

 same specimen determined by Froggatt himself show 14 distinct joints. 



