502 Mr. R. Shelford's Studies of the Blattidse. 



51. Tribonium guttulosum, Wlk. 



Nauphceta guttulosa, Walker, 1. c. p. 184 (1868). 

 %. Brazil. 



Allied to T. elegans, Br., but much larger, head entirely 

 black, apical half of antennae fulvous, pronotum and teg- 

 mina more heavily marked, abdomen and legs darker. 



52. StenoUatta paralcUa, Wlk. (Plate XXX, figs. 7, 7a.) 



SteoioUatta jmralella, Walker, 1. c. p. 193 (1868). 

 3 $ ?. Brazil. 



This extraordinary linear and flattened cockroach has 

 apparently not been met with since Walker's description 

 of it appeared. Walker placed it in his family Hypnorm- 

 idm (= Plcctoptcrinx.) and Kirby (Syn. Cat. Orth. I, p. 179) 

 places it at the end of the PlectoptcriniB ; but since the 

 wings do not possess a triangular intercalated area this 

 classification is evidently wrong ; the large, produced 

 supra-anal lamina with notched margin and the presence 

 of large arolia between the tarsal claws fix the position of 

 the genus amongst the PanchloriniB of which sub-family, 

 it may be considered an aberrant member. 



Walker's description, so far as it goes, is quite accurate, 

 except in his determination of the sex of the specimens, 

 and the following may be regarded as merely supplement- 

 ary to it : — 



Head much tlattened, the vertex between the eyes forming a 

 sharp edge, semicircular in outline, eyes very narrow. Tegmina 

 punctate at base, radial vein very straight, bifurcate, the lower 

 branch ramose, costals numerous, obsolete and irregular, live dis- 

 coidal sectors, discoidal field reticulated, nine axillary veins. Wings 

 withanteriorhalfflavid, posterior field infuscated, costal veins higlily 

 irregular and reticulated, median vein quite straight, ulnar vein 

 with five branches, two of which go to the dividing vein. Supra- 

 anal lamina projecting considerably beyond the sub-genital lamina ; 

 cerci equal in length to supra-anal lamina. Legs very short, femora 

 without spines, tibiae very sparsely spined, the front pair with four 

 apical spines only, hind pair with a few in a double row on the 

 upper border, two only on the lower border and four apical spines. 

 Arolia relatively enormous, tarsi only half-length of tibise, which are 

 two-thirds length of femora, metatarsus not longer than the following 

 three joints, shorter than the last joint. 



