PHASMIDyE in the BRITISH MUSEUM. 465 



Bactricia, gen. uov. 



Apterous in both sexes : very long and slender ; liead with two strong spinous 

 processes on the vertex in the male ; lamellated processes in the female placed near 

 together; legs inibescent, especially the tarsi ; tirst joint of tarsi as long or longer than 

 all the rest, not apjiendiculated, but carinated in the female ; legs unarmed in male, 

 armed with strong subtriangular spines in female, on the carinas above and below ; 

 median segment one-tifth the length of the metanotum in male, one fourth in female ; 

 styles of male large, broad, almost spatulate, and strongly curved, crossing each other ;_. 

 operculum of female very long, longer than the last three segments of the abdomen 

 together ; obtusely rounded and slightly expanded at the extremity. 



The type is 



Bactricia Trophimus. (Plate XXXIX. tigs. 3, 3 «, d ; figs. 1, 4 a, ? .) 



(^. Bacteria Trophimus, Westw. Cat. Pliasiii. p. 30. ii. 85. pi. v. fig. 5 (1859). 



? . Bacteria bituberculata, Westw. 1. c. ]j. 180. n. 467 (1859); Scliaum, Monatsb. Akad. Wiss. Berlin, 

 1857, p. 423 ; Peters, Reise nach Mossambique, v. p. 558 (1862). 



The female figured is from Natal, but appears to agree with the description given by 

 Westwood of the typical specimen in the Berlin Museum. Unlike as the sexes ajipear 

 at first sight, they present so many points of resemblance on a close examination, in 

 everything except the form of the horns, and in the appendages of the legs in the 

 female, that I feel justified in placing them together. Besides the typical male, there 

 are two other males very closely resembling it, also from Natal, in which the cephalic 

 horns are reduced to mere tubercles. In the absence of a sufiicient series, I content 

 myself with simply recording the fact. 



I am not certain of the real affinities of this genus, and place it in the Lonchodince 

 with some doubt. 



There are one or two other East-African species allied to Bactricia in the Bi'itish 

 Museum, but in poor condition and only in single specimens. One of these, from Natal, 

 appears to be referable to Phibalosoma calametmn. Bates (Trans. Linn. Soc. xxv. p. 3il), 

 and differs from Bactricia in the sides of the tarsi being raised. 



In [Phasma) calcaratum, De Haan, the median segment is likewise very short. 



Promachus sordidus, sp. n. (Plate XL. figs. 4, 4 a.) 



Female. Dark brown, rugose, with a depressed line on the head and prothorax, and a 

 crossed depression on tlie latter ; the rest of the body strongly carinated on the median 

 line. Pcniora with three or four rows of small teeth on the carina3. Head with two 

 strong spines at the back, followed by two in front of the prothorax and two behind ; 

 mesonotum with three strong spines on each side, two central ones just behind the level 

 of the middle lateral ones, and two more central ones at the extremity. Metathorax, 

 median segment, and the remaining segments of the abdomen all with a single spine 

 towards the extremity, on the central carina, gradually diminishing in length towards 

 the end of the body. Metathorax with a long spine, preceded by a short one on the 

 sides, and another strong spine lower down, in front of the hind coxae. Segments 2-(> 



second series.— zoology, vol. vi. 62 



