ERIC MJÖBERG, ISOPTERA. 83 



Neotenic queen. Whitish, with light yellowish head, 

 eyes flattened, rounded; antennae 15-jointed as in the worker; 

 prothorax with smaller darker spöts here and there except 

 on an area of the same shape as found in the yellowish 

 raarkings on the prothorax of the imago (not described!), 

 truncate in front, rounded at the hind margin, thickly hairy; 

 abdomen with faint, light brown cross-plates. 



Measurements: Length of body 10 mm, length of head 

 1,24 mm, breadth of head 0,99 mm, length of prothorax 

 0,51 mm, breadth of prothorax 0,9 5 mm, breadth of abdomen 

 2,50 mm. 



A very distinct species, easily recognizable by the shape 

 of the head and the very short and stout jaws with the 

 obtuse median tooth. 



The species builds a very characteristic nest of the shape 

 as shown in Text Fig. 63. It attains a height of about one 

 meter and a diameter at the base of about 30 centimeters, 

 tapering very strongly to the tip, which is sharply pointed. 

 It consists of a very fine, thin and brittle cover of a greyish 

 substance and a more solid interiör containing the galleries, 

 which are of the usual type. 



57. Hamitermes obtusideiis n. sp. 



Imago (Text Fig. 40 b). Head dark brown, prothorax, 

 chitinous plates of abdomen and antennse dark brown, under- 

 side with mouth-parts and legs light yellowish. 



Head rounded, flattened on the summit, dark fuscous 

 with numerous small yellow rounded spöts, thickly hairy; 

 eyes not very large, fairly projecting; ocelli large, yellow, 

 oval, oblique; fontanelle yellow, oval, continuing forwards 

 in a more narrow yellow line, which soon branches up into 

 two diverging branches; basal part of clypeus light brown, 

 divided by a darker median suture, rounded at the anterior 

 angles, truncate in front, apical part whitish, produced in 

 fmnt; labrum swelling out to the tip, rounded at the sides; 

 jaws large, triangulär, the left with two very long and 

 sharp apical teeth, the second continuing into a sharp 

 ridge backwards, basal part forming a large triangulär obtuse 

 tooth with a much smaller and rounded one at the base 



