430 



HALTICINJE. 



small, third longer than second but very slightly (or in some 

 cases distinctly) shorter than fourth ; apical segments generally 

 shorter and thinner ; but in the different species there is a certain 

 amount of variation from this type of antenna. Prothorax 

 convex, broader than long ; anterior lateral angles generally more 

 or less thickened, the thickening being of various forms ; surface 

 generally very finely and more or less sparsely punctate. Scutellum 

 small, oval, impunctate. Elytra convex, almost as broad at base 

 as prothorax, always confusedly and finely punctate ; sometimes 

 the punctures are of two different kinds, some being very fine 

 while others are coarser. Underside : anterior coxal cavities 

 open behind ; posterior femora thickened ; posterior tibiae 

 channelled to a certain distance on the outer side and not armed 

 with a spine at the apex ; claws appendiculate. 



Range. Europe, Siberia, Japan, Malaysia, Burma. 



According to Chapuis the insects belonging to this genus have 

 the anterior coxal cavities open behind. I have examined several 

 species referred to Argopus in the British Museum and I find 

 that they have the anterior coxal cavities closed. Not having seen 

 the type of Argopus bicolor, Fischer, I cannot express an opinion 

 as to the coxal cavities * ; Fischer himself is silent about it. In 

 describing Argopus- indicus, Jacoby does not refer to this part of 

 the anatomy at all. On account of the absence of accurate 

 information on this point I have treated this genus separately, 

 without incorporating it in the key on pp. 283-286. 



352. Argopus indicus, Jacoby. 



Argopus indicus, Jac, Ann. Mus. Civ. Genova, xxvii, 1889, 

 p. 194. 



Body ovate, convex. Colour shining dark brown ; the six 

 apical segments of the autennse, and the apices of the mandibles, 

 black. 



Head not longer than broad, impunctate; frontal elevations 

 broad and not strongly raised ; carina acute, convex ; clypeus 

 simple. Antennae very closely approximated ; third segment a 

 little longer than second, fifth longer than any of the preceding 

 or following segments. Prothorax much broader than long, sides 

 rounded, angles not produced, the anterior pair only slightly 

 thickened, posterior margin distinctly sinuate at each side, broadly 

 rounded and produced at the middle ; surface very closely, finely 

 and rather evenly punctate. Elytra more strongly and rather 



* Since the above was written, the courtesy of Dr. TJvarov has enabled me 

 to see some specimens from Poltava, which have recently been sent to the 

 British Museum and which have been determined by D. Ogloblin as Argopus 

 bicolor. In these examples the anterior coxal cavities are open. It may be 

 remarked that Poltava is very near Elisabethgrad, whence Fischer originally 

 described the species. 



