of some Hemipterous Insects from Boutan. 193 



Ventral spine brown. Legs, rostrum and antennae brownish 

 testaceous ; the fourth joint of the antennae, except its base, the 

 fifth joint entirely, and the apex of the fourth joint of the rostrum, 

 black. 



Plate XIX,, fig. 5 a, represents the head seen from above ; 5 b, the head 

 from beneath and laterally ; 5 c, a tarsus. 



MM. Amyot and Serville have established a genus which they 

 name Sastragala, for the reception of such species of Acantho- 

 soma, as have the posterior angles of the prothorax much pro- 

 duced into a sharp spine. This character is scarcely sufficient to 

 warrant such a separation, and the greater or less sharpness of 

 the spine is probably only a sexual character. It is to this divi- 

 sion of the genus that the three species from Boutan belong; the 

 first being the Acanthosoma uniguitatum, Don., the species cited 

 by Amyot and Serville as the type of their genus. The other two 

 appear to be undescribed. 



Sp. 7. /Acanthosoma (Saslragnla) cornulum. (PI. XIX. fig. 6.) 

 A. (S.) supra olivaceum, punctatum, thorace cornuto, scutello 



immaculato, $. 5. 

 Long. lin. 6 ; lat. thor. lin. 4|. 



^,5. Above olive, slightly clouded with yellowish, rather 

 thickly and strongly punctured. Thorax with the lateral angles 

 strongly cornuted ; the processes being more darkly coloured 

 than the rest of the surface. The antero-lateral margins of the 

 prothorax beneath are greenish. Scutellum acute, slightly sinu- 

 ated on each side immediately before the apex. Elytra thickly 

 and strongly punctured ; membrane brownish at the base, par- 

 ticularly at the internal angle. Antennae with the first and second 

 joints concolorous with the body, the apex, and sometimes the 

 whole of the third, and the fourth and fifth joints pitchy. Legs 

 pale brownish yellow, with the tibiae and tarsi somewhat darker. 

 Ventral spine long, reaching as far as the base of the anterior 

 legs. 



$, with the thoracic processes dark olive-green, rounded at 

 the apex, beneath flat, but not channelled. The membrane of 

 the elytra is pale, semitransparent ; the abdomen above red, with 

 broad whitish margins. The body beneath is pale ochreous, with 

 a reddish tinge towards the apex of the abdomen. Ventral spine 

 pale. 



x2 



