TKICHIUS. 



251 



236. Tricliius alboguttatus. 



Tricliius iilboauttatus, Moser* Ann. Soc. Ent. Behjiquo, 1905, 

 p. 215. 

 Black, with the clypeus, prothorax, scutelhim, elytra, a broad 

 line along the middle of the pygidium, and the legs deep crimson 

 in the 6 , and the femora and tibicT3 only in the ? ; decorated \yith 

 the following white markings :— an incomplete narrow margnial 

 line on each side of the prothorax (in the d ), ^ spot on each 

 mesosternal epimerou, six spots at the median part of each elytron 

 (viz., two near the outer margin, two towards the inner margm, 

 and two along the middle line) and usually one adjoining the 

 scutellum and one in the apical angle of each (at least in the 6 ), 

 and an elongate patch on each side of the pygidium (usually 

 divided in the $ ). There are also generally patches, in the 6 at 

 least, on the metasternum, the front and hind coxa?, and two rows 

 on each side of the abdomen beneath. 



It is a small species, entirely opaque above and very thinly 

 clothed with yellow seta? beneath. The liead and ivynotum are 

 rugosely punctured, the chjpeus as long as it is wide, with the sides 

 strongly curved and the front margin bilobed. 'I\\e prothorax is 

 broader than it is long, slightly attenuated in front, with the 

 margins irregularly rounded and a broad furrow along the middle 

 of the disc. Th.e scutellum is strongly punctured, with a smooth 

 median carina, and nearly semicircular in shape. Tlie elytra bear 

 impressed rows of annular punctures, the pyrikUum is finely 

 strigose, the metasternum entirely rugose and the abdomen coarsely 

 punctured. The legs are very slender and the front tibice 

 bidentate. 



In addition to the different colouring described above, the male 

 has the prothorax less transverse than the female, the hind tarsi 

 longer, and the abdomen rather concave beneath. The club of 

 the antenna is about as long as the footstalk in the female, and 

 nearly twice as long in the male, 



Length 10-12 mm. ; breadth 3-3-5 mm. 



Assam ; Khasi Hills. 



Ty2}e in coll. Moser. 



237. Tricliius discolor. (Plate II, figs. 8 & 9.) 



Tricliius discolor, Jonla7i, Ami. Nat. Hist. (6) xv, 1895, p. 219. 



Black, with the antennae, legs, clypeus, prothorax and elytra 

 more or less testaceous red. The pronotum is decorated with a 

 white marginal line, interrupted in the middle, and (usually) a 

 small discoidal white spot on each side ; each elytron with a white 

 spot in the middle and another placed a Httle behind and outside 

 of the first. The colouring is exceedingly variable, but the femora, 



