386 Mr. A. G. Butler on new Blattarias. 



and obtusely dentated at the sides, strongly keeled ; the back 

 of the pronotum also forms a nearly flat oblong transverse 

 plane, a little higher than the anterior surface, and terminating 

 on each side before reaching the margin of the pronotum in 

 an obtuse angle ; the meso- and metanotum are also deeply 

 excised behind, the metanotum forming in consequence broad 

 lateral pterygoid expansions ; the antennre extend nearly to 

 the extremity of the abdomen and are coarsely setose in the 

 male ; the tarsi are provided below with large soft pads, as in 

 Groinpliadorhina ; the cerci are short, not extending beyond 

 the supraanal plate. 



2. ^luy^ojjoda gigantea, BTp. n. 



^ . Black, with broad, deep-red lateral borders, but tliose 

 of the pronotum variable in extent, sometimes reduced to a 

 small spot on each side ; the meso- and metanotum with large 

 patches of tlie same colour in front, and the first three ventral 

 segments with their anterior margins similarly coloured ; the 

 clypeus testaceous in front ; anterior margin of the pronotum 

 and antennge clothed with ferruginous setoe ; tarsal pads pale 

 dull stramineous ; the pronotum in adult examples is coarsely 

 rugose and sparsely granulated at the sides ; the meso- and 

 metanotum are smooth in the centre, covered with fine reticu- 

 lations, and finely and sparsely punctured, divided down the 

 centre by a tolerably deeply impressed longitudinal line, 

 marked on each side near the front by a small shallow impres- 

 sion, and close to the posterior margin by a large and irre- 

 gular impression ; the sides are obliquely depressed and some- 

 what concave, rugose and granulated ; the abdominal segments 

 are in structure similar to those of the preceding species, ex- 

 cepting that their lateral angles terminate in small spine-like 

 denticles. On the under surface the structure is nearly the 

 same as in GromphadorJiina ; but the last ventral segment 

 has its hind margin excised in a regular arch. Length of 

 adult example 69-73 millim., of pronotum 12-14 millim. ; 

 width behind 26-33 millim., width of mesonotum at posterior 

 angles 31-34 millim., of metanotum 30-32 millim. 



Young examples are similar in structure, but less rugose 

 than the adult ones ; but very young larval forms have the 

 pronotal excrescences and the excavation of the anterior 

 margin considerably less pronounced, and therefore much more 

 like the female, in which the anterior margin is scarcely more 

 than a straight transverse line, even in adult examples. 



The following sizes are before me, in addition to the adult 

 males already noted: — (^ ?, length 51-52 millim.; ? , 47 

 millim. ; (5^ ? , 42-43 millim. ; ^ '^ , 35-38 millim. 



