82. MR. G, A. K. MARSHALL OX COLEOPTEEA [Jan. 19,. 



become smaller posteriorly and vanish behind middle ; intei'vals 4 

 and 6 quite plane ; interval 2 smooth to bejond middle, but with 

 a ci'istate row of six small tubei'cles on the declivity ; interval 3 

 with a very regular row of closely-set i-ounded tubei-cles ceasing 

 abruptly behind middle ; intervals 5 and 7 with similai', but 

 complete, rows, the tubercles on 5 slightly increasing, those on 7 

 decreasing, in size towards apex ; tubercles bare, with very shoit 

 depressed seta?, interstices with dense brown scaling. Legs with 

 rathei- denser pale scaling and setaj ; the joints of posterior tarsi of 

 about the same width, 2nd and 3rd subequal in length, 1st longer. 



Cape Oolonv. 



Type in the British Museum. 



The very regular-, closely-set, i-ounded tubei'cles on the elytra 

 give this insect a veiy distinct appearance from the other membeis 

 of theyer«s-group. 



69. H. TRicosTATUs Mshl. (Plate II. fig. 7.) 



H. tricostatus Mshl. 1. c. p. 411 (1902). 



Long, 13, lat. 6 mm. 



Head convex, finely and dispersely punctured, forehead with a 

 small central fovea ; anteocular fuirows shallow and ill-defined. 

 Eostrv/m not incised at base, about as long as head and prothorax, 

 slightly curved. Upper surface without any furrow or carina^ 

 convex at base and faintly impressed towards apex, distinctly 

 punctured except along a Inroad smooth central line ; lateral sulci 

 not meeting at base, the upper pair narrow but distinct, the lowei- 

 pair almost obsolete ; scrobes directed beneath base of rostrum ; 

 inferior basal furrow absent. Antennce with scape not reaching 

 eye ; the two basal joints of funicle subequal. Prothorax as long 

 as broad, the length much greater than the width at base, which 

 is, about equal to that at apex, sides gradually but strongly dilated 

 from apex and suddenly narrowed neai- base, broadest far behind 

 middle, ocular lobes strongly developed. Upper surface plane. 

 with a very high, naiTOW, central carina, and on each side of it a 

 broad, smooth, strongly raised costa, the costte uniting at apex so 

 as to form an elongate horseshoe, the ends of which are sometimes 

 interrupted near the base ; outside the costa is a broad smooth 

 space followed l^y a lateral row of small closely-set single tubercles 

 forming the most prominent part of the lateral dilatation ; tubercles 

 and costee black and shiny, the interstices with bi'own scaling.. 

 Elytra ovate, shoulders sloping, sides modei^ately rounded, broadest 

 rather before middle, apical processes in 2 very short but shar|). 

 Upi^er surface convex, with rows of fovese, those in adjoining rows 

 often merging so as to give the elytra the appearance of being 

 strongly wrinkled transversely ; intervals 1, 4, and 6 entirely with- 

 out tubercles ; interval 2 with a short apical row of four or fi^e 

 sharply conical tubercles ; interval 3 with a row of five or six 

 larger siibconical tubercles ceasing behind middle ; intervals 5 

 and 7 with complete rows of conical tubercles, those on the 

 former much larger and sharper near apex ; tubercles black, 



