178 DR. A. D. IMMS ON 



are two ventral pads or arolia present on the first tarsal joint (" metatarsus") and a 

 single such pad on the second tarsal joint (text-fig. 3). 



The Abdomen has its dorsal surface moi'e hairy than in the male, this feature being 

 apparently correlated with the absence of wings. The tergal plates of the 8th and 9th 

 segments are suhequal in size, shorter than those of any of the preceding segments, and 

 the 9th tergite, moreover, exhibits no asymmetry. The 10th tergum is somewhat longer 

 than the 9th ; it narrows posteriorly and the hind margin is prominently rounded 

 (PL 38. fig. 1). The 8th sternum is the subgenital plate. It has a median transverse 

 incision in its posterior margin, which marks the position of the genital aperture (g.ap. 

 in PI. 38. fig. 4). The sterna of the 1st and 8th segments are smaller than any of the 

 remaining sterna. The 9th sternum varies from 2-2| times the length of the 8th, and 

 its posterior margin has a small shallow median notch. The 10th sternum, unlike that 

 of the male, is divided longitudinally into two symmetrical plates (st. l0 in fig. 4). The 

 right and left cerci are similar to one another, and at the base of each cercus there is an 

 annular vestige, which may possibly represent the basal plate *, present in relation with 

 each cercus in the primitive genus Clothoda, Enderl., and well developed in most 

 Embiid larvae. 



Coloeation. — Dorsally the coloration varies from uniform dark brown to almost 

 black, and in some lights it appears quite black. The intersegmental regions between 

 the head and the prothorax, between the prothorax and mesothorax, and between the 

 mesothorax and metathorax, are membranous, flexible, and whitish in colour. The 

 pleural region commences from the basal half of the metathorax and extends backwards 

 to the extremity of the 8th abdominal segment, and is similarly membranous. It 

 appears as a prominent whitish line running along each side of the body, and visible 

 dorsally as a pair of lateral streaks (PI. 38. fig. 1). The antennas are similar in colour 

 to the head, with the articulations between the individual joints paler. The distal half 

 of the clypeus {ante-clypeus), the labial and maxillary palpi, the region around the 

 articulations between each of the joints of the legs, the two apical joints of the anterior 

 tarsi, and the tibiae and tarsi of the middle and posterior pairs of legs are lighter in 

 colour thau the rest of the body. The claws of the feet are yellowish- white with 

 piceous apices, and the cerci are yellowish-white at their extremities. Ventrally the 

 coloration is paler than dorsally, with a slight primrose tinge in many individuals. The 

 sternum of the 8th, with the exception of its median portion, and the sterna of the 

 9th and 10th segments are darker in colour than those of the preceding abdominal 

 segments. 



-o 1 



" Cercus basipodite " or " Grundplatte " of the German authors. 



