170 GUY A, K. MARSHALL. 



containing a pair of large lunate chitinous plates about the middle, the surface of the 

 sac around them being closely studded with asperities, and no plates at the median 

 orifice ; the tegmen with the ring not closed in the normal manner, but the chitinous 

 rim continued vaguely into the corresponding dorsal lobe on each side, the lobes 

 united for a short distance at the base and a little shorter than the length of the 

 ring, the strut being only half this length. Genitalia of $ with a rather irregular, 

 oblong chitinous patch in the wall of the vagina opposite its junction with the oviduct, 

 and a similar broad V-shaped plate adjoining it anteriorly ; the spermatheca (fig. 7, d) 

 very broadly comma-shaped, the apex obtusely rounded, and the accessory gland 

 twice as long. 



Length, 5-4-11 mm.; breadth, 2 -2-4 -8 mm. 



United Provinces : W. Almora div., Kumaon, on Pinus longifolia {H. G. 

 Champion — type) ; Ranikhet, Kumaon, bred from P. longifolia [H. G. C.). Punjab : 

 Dalhousie Range, Chamba State, bred from P. longifolia (C. F. C. Beeson). 



Its remarkable dark sooty colouring and flattened upper surface distinguish this 

 species from all its Indian congeners. 



The species of this genus possess a stridulatory apparatus, which is the same in 

 the two sexes, and consists of a file formed of transverse striae at the apex of each 

 elytron on the lower surface ; the scrapers that play on these files are situated on 

 the seventh abdominal tergite and consist of two longitudinal rows of small, rather 

 widely spaced granules. 



Genus Rhadinomerus, Fst.* 



In his revision of the African species of Mecistoccnts and Rhadinomerus (Ent. 

 Tidsk. XXV, 1904, p. 186) Prof. K. Heller treats the latter genus as merely a sub- 

 generic division of Mecistocerus. I agree with him that the supposed differences in 

 the structure of the venter used by Faust are quite unreliable ; but this does not 

 apply to the form of the femora. In Mecistocerus these organs are clavate, being 

 markedly narrowed towards the base, whereas in Rhadinomerus they are sublinear, 

 being but little or not at all narrowed at the base ; moreover, as Faust indicated later 

 (Ann. Mus. Civ. Genova, xxiv, 1894, p. 279, note), the species of Mecistocerus can 

 be distinguished by the presence of an elongate bare shiny patch at the base of the 

 femora on the dorsal edge. But a more important point, which has hitherto been 

 overlooked, is that Rhadinomerus entirely lacks the apical stridulatory apparatus 

 that is present in both sexes of Mecistocerus ; and, finally, in females of the latter 

 genus the eighth abdominal tergite is as long as or longer than broad, whereas in 

 Rhadinomerus it is distinctly transverse. On these grounds it seems desirable that 

 Faust's genus should be retained unless these characters are shown to be unstable. 



Rhadinomerus bombacis, sp. nov. (fig. 6). 



(J$. — -Colour black ; the prothorax with sparse, large, pale scales, which often form 

 a narrow median line and an indefinite lateral one on each side ; the elytra with very 

 dense brown scaling, variegated with a few pale spots and transverse blackish 



* Faust, Stett. Ent. Zeit. 1892, p. 215. 



