SEBEICOKNIA (ELATEEIM). 553 



the dorsum are brownish-olivaceous, instead of dark blue, as described by Capt. Casey. 

 It is possible that the Mexican specimens may prove to belong to yet another species, 

 but in the absence of a typical C. apacheanus for comparison it is inadvisable to name 

 it. Moreover, Capt. Casey has incorrectly identified the sex of the specimens he 

 describes, and what he supposes to be the male is really the female. Many of the 

 species of Chalcolepidius vary enormously in size, and also in the colour of the small 

 scales on the dorsum ; these characters are, as a rule, of little or no value in distin- 

 guishing the various forms. 



8 (a). Chalcolepidius monachus. 



Chalcolepidius monachus, Cand. Elat. Nouv. v. p. 16 (1893) \ 

 Hab. Mexico, Chihuahua 1 . 



The type of this insect (kindly lent by Dr. Candeze) is an abraded female. It is, in 

 my opinion, a small varietal form of C. lacordairei, with the longitudinal ruga? of the 

 thorax coarser than usual. The puncturing of the elytral stria? (which cannot be seen 

 till the scales are removed, and is stated to be coarser in G. monachus than in C. lacor- 

 dairei) is similar, and the brownish-olivaceous colour of the scales is of no importance, 

 as we have eight specimens of C. lacordairei from Mexico with the scales thus coloured, 

 as well as others in which they are greenish, instead of blue. 



SEMIOTUS (p. 287). 

 7 (a). Semiotus cams. (Tab. XXIV. fig. 4, s .) 



Semiotus cams, Jans. Cist. Ent. iii. p. 34, t. 1. fig. 2 ( ? ) (1882) \ 



Var. The elytra with the sides from the basal fourth to the apex very broadly, and a rather broad sutural 



stripe, black. 

 Semiotus antennalis, Cand. Elat. Nouv. vi. p. 16 (1896) 2 . 



Hab. Panama, Veraguas 2 . — Ecuador, Chiguinda l . 



Of this interesting addition to the Central- American fauna Dr. Candeze has recently 

 received a specimen from Dr. Staudinger. The Panama insect ( c? ), for the loan of 

 which we are indebted to Dr. Candeze, and from which our figure is taken, merely 

 differs from the types ( <j and $ ) of S. earns in having the black marginal stripe of 

 the elytra more extended inwards. 



OISTUS (p. 292). 



3. Oistus suturalis. (Tab. XXIV. fig. 5.) 



Elongate, broad, robust, flattened above, shining, the elytra subopaque ; head and antennae black, the prothorax 

 and scutellum rufo-ferruginous, the elytra black with a greenish lustre, with the suture to the first row 

 of punctures and the exterior limb rufo-ferruginous, the under surface rufo-ferruginous, with the abdomen 



biol. centr.-amee., Coleopt., Vol. III. Pt. 1, October 1896. 4 B 



