S5 



and gradually tapering lowards front margin: Hie median prolongation of the latter 

 is pointed, but not well liniited liehind and giving the whole margin the ajjpearance 

 of an obtuse angle open behind and with the corner in the middle. Skin smooth 

 with a few short and pointed hairs. 



Abdomen. — The abdomen is rather slender and broad in the middle; the 

 sclerites, which are half as long as their tergites, increase in length and in breadth 

 from before backwards, and are longitiidinalli] divided with the exception of the first 

 and the two last ones; each tergitc bears a transverse row of rather short, pointed 

 hairs. The tenth tergite bears two pair of "tactile" hairs, while the eleventh 

 lergite as well as the corresponding sternite bear a single pair of "tactile" hairs 

 each. The sternites are in other respects similar to the tergites. 



Antennae (fig. 5 a). — The antennae are almost half as long as the céphalo- 

 thorax and one third as broad; they are very long and slender, and provided with 

 longer and shorter hairs. Tlie immovable finger is terminated with a moderately 

 pointed and curved hook; inner margin i)ehind this dorsally with about ten tiny 

 teeth. The movable finger has a rather suddenly but moderately curved hook; in 

 the third fourth part, measured from the base of the finger, and just beliind the 

 hook six densely placed marginal teeth are placed dorsally. Four hairs, decreasing 

 backwards, pointed, rather short and with a few marginal teeth constitute the 

 flagellum \ a narrow, but distinct lamina exterior is present (fig. 5 a, è). The serrula 

 interior consists of about 20 teeth and is very much elongated (fig. 5a, a); it is 

 remarkable by a well developed plate-shaped portion, gradually merging into twelve, 

 broad and almost completely fused teeth, beyond which four obtusely pointed and 

 well separated ones follow; tlie last and in a less degree the last but one are 

 pointed and serrated along hinder margin ; apparently in continuation of the 

 already described organ, we have a moderately curved, pointed and behind serrated 

 spine, which really is placed on a lower level (fig. 5 a, t) (cf. p. 19). The serrula 

 exterior is scarcely free in its distal third part, and consists of 22 teeth, which are 

 all more or less blunt; the galea is long and moderately curved. 



Labrum (fig. 5 b, Z). — The anterior prolongation of the labrum is very long 

 and slender; it is broadest in the middle, where the outline is convex, and tapers 

 towards the base and the end as well; the latter is obtusely rounded; the median 

 part is as far as can be seen witiiout dissection provided with a well raised longi- 

 tuginal keel. 



Maxillae (fig. 5 b). — The maxillae are almost placed on a level with the coxae; 

 they are tapering towards the end; tlieir manducatory part is short, well set oil" 

 and bears three long pointed hairs; the maxillae are granular laterally. The lamina 

 maxillaris superior [Is] is long and slender, but not projecting as far anteriorly as 

 the labrum; the lamina inferior (li) is distinctly longer than broad and fairly 

 rounded in front; the median lyriform organ is not so distinct as in /. Si(tmensis 

 n. sp. and placed more laterally. 



