450 Mr. G. C. Champion on 



Dr. Marshall and the late H. C. Dollman in Pthodesia, &c., 

 have fortunately enabled me to allocate one (J and several 

 $ ? , described as new species, to their respective partners. 

 Jliops and Hedy bias have 5-jointed^ and Philkedonus 4- jointed, 

 anterior tarsi in ^ ; the antennae are distinctly 11-jointed in 

 each of them, in both sexes, a character separating these 

 genera from Hapalochrus. Under //efl'?/6/'M5,Erichson included 

 species with simple anterior tarsi in ^ and others with the 

 second joint prolonged or raised at the apex above the base 

 of the third in the same sex ; H. hirtus, F. (^ = ocidatus, 

 Thunb.), is here taken as the type, although only one-fourth 

 of tlie species now known agree with it in the tarsal structure, 

 the others, which would be almost equally w ell placed under 

 Illops, having the tarsi formed as in Attains. Two im- 

 portant (^-characters in i^e^yiiws have hitherto been over- 

 looked : (1) The strongly biuodose and sulcate superior 

 apices of the anterior femora (H. marshalli, Gorh.) ; (2) the 

 presence of a shining black area above or beneath one or 

 two of the basal joints (usually on 3 and 4) of the antennae 

 {H. ammnus, Gorh., &c.), in addition, in some cases, to a 

 sharply-defined line or apical marking on the upper surface 

 of five or more joints in the same sex. Another J -pecu- 

 liarity in certain Hedybii is the tooth [H. dentatithorax. 

 Pic, &c.) or notch (H. marshalli) at the sides of the 

 prothorax, w hich is wanting in $ . The extraordinary 

 erosion, plication, or armature of the head in the males 

 of these insects is difficult to describe ; but it may be stated 

 that, in the species with a central tuft of hairs on the 

 anterior margin of the prothorax, the head is plicate or 

 raised immediately in front of it. The structure of the 

 head in this sex separates the numerous species belonging 

 to the second section of Hedybius from Attains s. str., the 

 latter, as defined by Abeille de Perrin in 1891, having the 

 "frons in mare simplex," e.g. formed as in the ? . The 

 elytra of the ^ are without apical plication or excavation in 

 all the species enumerated in the present paper; one of 

 them, however (H. jlavo ductus), lias a sharp humeral plica 

 iu this sex. 



Illops. 



Illops, Erichson, Entomographieii, p. 87 (1840) ; ALeille de Perrin, 



liev. d'Eiit. xix. p. 170 (lUOO) [tvpe /. corniculatus, Er.]. 

 Hedoiiistes, Qorliam, P. Z. S. 1905, "ii. p. 278. 



A genus scarcely separable from the second section of 

 Hedybius, and only dift'ering from it in the greatly thick- 

 ened or dentate fifth and sixth antennal joints in the J . 



