FAMILY PLATYPODIDAE 613 



In the plains species have been taken infesting the sal, pyinkadu, 



Tcnnijialia, Nanclea sessili flora, Mcliiisa, Pithecolobium, Ahtonia,Wendlandia, 

 Dalbergia. 



Chapuis, in his Monograph*: ties Platypides, divides the family (which he treats as a 



sub-family) into nine genera : Crossotarsns, Platypus, Tesserocerus, 



Classification. Spathidicerns, Periommatns, Symmerus, Mitosoma, Cenocephalus, 



and Diapus. 



Of these three only are known at present to contain species of importance in the forests, 

 i.e. Crossotarsus, Platypus, and Diapus. 



Crossotarsns. Head as wide as the prothorax, often concave and carinate in . 

 Maxillary palpi membranous, depressed. Mentum in with base coarctate. 

 Mandibles convex on outer and concave on inner face, with a tooth below summit. 

 Abdomen often appears vertical (resembling genus Scolytus], the posterior pair of 

 legs appearing to be placed at the end of the body and far apart from the two anterior 

 pairs, which are close together. Most of the pygidium is exposed. 



Platypus. Head as wide as thorax in $, a little less in $. Maxillary palpi as in 

 Crossotarsus. Mentum in $ with base dilated or linear ; mandibles short, robust, 

 armed with two teeth on inner face ; pygidium covered up in both sexes ; apex of 

 elytra varies in sexes. 



Diapus. Head wider than thorax, prolonged into a short rostrum. Maxillary palpi 

 coriaceous, cylindrical. Mandibles often with an appendage. Front coxae far apart. 



CROSSOTARSUS. 



Crossotarsus coniferae, Stabbing. 

 (The Deodar Wood-boring Platypid.) 



REFERENCES. Stebbing, Depart. Notes, i, p. 411 ; id. Crossotarsus piccae, p. 11.?; hid. For. Memoirs, 



For. Zool. Ser. ii, pt. i, 66 (1911). 



Habitat. North- \Yest Himalaya. 



Trees Attacked. Deodar (Cedrits deodara}, Spruce (Picca inorindti}. 

 Tehri Garhwal, Jaunsar, Chamba. 



Beetle. Klongate, narrow, reel-brown, shining : head nearly black. In the leinale the 

 head is large witli a transverse median line and two longitudinal depressions behind it on the 



vertex. I'rothorax smooth, shining, with close wavy transverse 



Description. slr.ac, punctate posteriorly. Klylra broad, slightly \\ider in front 



than behind, striate-punctate, striae less defined mrdianly, tnmr.ite. 



apex terminating in a calliper-like process, the points much incurved, the truncate portion 

 clothed with stiff yellow hairs. Ventral surface shining, abdominal segments roii>a\e. Mark. 

 Legs yellowish brown. In the male the head is smaller, the transverse line being absent ; the 

 elytra are narrower and parallel, the terminal hooks shorter and only slightly curved inwaids : 

 abdomen not concave. Length, 4 mm. to 4.7 mm. I'l. Ixii shows the male and female beetles. 



Egg. Ovate, elliptical, white, semi-translucent. KesemMes a lien's egg <->i miniature. 

 Length, 0.75 mm. 



Larva (Young Stage). Elongate, straight, white ; thickest anteriorly, tapering posteriorly, 

 head pale yellow. Length, i mm. 



