160 LUCANIDiE. 



D. madeayi has a close resemblance to D. donckieri. The 

 mandibles are alike in the males of both but the much broader 

 prothorax of D. donckieri renders them easy to distinguish. 

 The slight oblique impression at the base of each elytron is a 

 distinctive feature of madeayi in both sexes, as is the form of 

 the prosternum, which is much more elevated and almost 

 compressed behind, 



8.3. Dorcus donckieri. (Plate XIII, fig. 5.) 



Hemisodorcus donckieri Boil., Bull. Soc. Eiit. France, 1898, p. 227, 

 fig- 

 Black, with the elytra deep red, their inner and outer margins 

 narrowly and rather indefinitely black. The tarsi bear con- 

 spicuous fringes of yellow hairs. Rather massive, with the 

 ])ronotum short and broad, the upper surface dull, but the 

 scutellum shining. The prosternal process long, but very 

 bluntly rounded at the end. The shoulders of the elytra 

 roimded. The sides of the mesosternum stnmgly jjunctured 

 and those of the metasternum densely rugose. 



$, The head is entirely opaque and coarsely unevenly rugose, 

 with two small transversely j)laced tubercles in the middle. 

 The mandible is almost straight externally, produced at the 

 tip, and bears a sharp internal tooth above and a blunt one 

 beneath. The jn-onotum is entirely opaque, with its front and 

 lateral margins rather coarsely rugose. The sides are regularly 

 roimded antl the basal angles broadly rounded. The elytra are 

 densely piuictured, the punctures rather strong upon the outer 

 lialf, fine and less close upon the sutural region. The four 

 posterior Ubix have each a lateral spine, that of the middle 

 tibia very strong. 



^. The upper surface is opaque, except the mandibles, 

 scutellum and the sutural margins of the elytra. The head is 

 broad in front, the eyes are small, the front angles of the head 

 obtuse and the sides strongly convergent behind the eyes. The 

 posterior part is flat, tlie anterior part sloping, the two regions 

 divided by a sharp curved ridge. The clypeal process is 

 sharjily angular in front. The head and pronotum are densely 

 granular, without punctures. The front angles of the pronotum 

 are very bliuit, t]i(^ lateral margins dilated and a littler liollowed, 

 diverging to the lateral angles, which form very strong lobes 

 almost continuous with the base, which is gently sinuatt^ on 

 each side, without distinct angles. The elytra are finely 

 (U)iiaceous and dull, but a little smoother close to the suture, 

 wlun-e there are line, rather indistinct punctures. The middle 

 tihia bears a fairly strong lateral spine and the hind tibia is 

 unarmed. 



Mandihle.'i of the male. I have seen only large examples, in 

 which the mandibles are long, a little curved downwards, 



