48 J. Wood-Mason — Species of FhasmidcB. [No. 1, 



? Much more robust, with a well-defined median raised dorsal line 

 along the whole length of the body, antennae absolutely shorter than those 

 of the male, but with the basal joint strongly carinate and more expanded. 

 The mesothorax is visibly att^'nuated in front from the commencement of 

 its apical third, meso- and meta-notum with a few minute warts along their 

 lateral margins ; meso- and meta-sternum with a few similar warts scattered 

 over their surface. 



The abdomen is sub-fusiform, depressed to the apex of the 6th segment, 

 and has a distinct ridge, which can also be detected on the thorax, running 

 internally and parallel to the lateral margins of all its dorsal segments 

 except the last ; its five posterior segments have another ridge on each side 

 midway between their sides and the median ridge. The posterior margin 

 of the sixth ventral is produced in the middle into a sharp spine with a 

 broad base. The seventh segment is nearly as long as the two last together ; 

 these are subequal. The last is subtruncate at its extremity beyond which 

 projects a small triangular azygos plate carinated above. Cerci, m form of a 

 tall four-sided pyramid with its angles rounded, project at the postero-lateral 

 angles of last segment. 



Operculm spatulate in outline and flat below, with a broadly rounded 

 extremity, not extending beyond the middle of the last segment. 



First joint of tarsus in anterior legs as in the male. The body is 

 covered with very short setae in both sexes. 



Total length, SJd lines, ant. 3^, head 2i, proth. 1|^, mesoth. 7^, metath. 

 5i, abd. 15i + 2^ = 17| lines. 



Hob. — South Andaman. Three males and three females, of which two 

 were taken in copula. 



I have received from Dr. Stoliczka, who obtained it from the Arakan 

 coast, an insect differing from the male insect above described only in its 

 greater length, in the absence of tubercles on the thorax, and in having two 

 more joints to the antennae ; the measurements are as follows : 



Total length 32 lines : ant. 6, head 1\, proth. l^, mesoth. 7f , metath. 

 6, abd. 13 4- 2f = 15f lines. 



Bacillus oxttenes, n. sp. PI. V. Fig. 3. 



9 Excessively long and slender. Head unarmed, narrow, almost cylin- 

 drical, being but slightly broader in front than posteriorly, notched behind in 

 middle. Antennae 28- jointed, as long as the terminal segment of the 

 abdomen ; first joint depressed, carinated above and expanded, second longer 

 than broad, also depressed. Mesothorax much longer than the metathorax, 

 sparsely granulated above and below, slightly expanded at the insertion of 

 the legs, otherwise of perfectly uniform width ; meta-thorax with only a few 

 scattered granules above and below ; meso- and meta-notum with a dark 

 raised mesial line. Abdomen long, perfectly smooth, very gradually and 



