908 [February, 
memory, it may be of use to remember tbe insect to which it refers by a mental 
inversion of the two names : sinuatocollis having the sides of its thorax mnch more 
toothed than denticollis, in which insect they are simply sinuate. 
M. svrmatocollis is apparently equally common with depressus, from which it 
may be distinquished by the characters already given. It is also on the average 
rather larger and more robustly built than that species (for I fail to see that it 
is somewhat narrower, as Kraatz remarks ; indeed, it seems to me to be just 
the reverse) with the thorax shallower and more transverse, and with a less distinct 
middle channel, the legs entirely red, and the punctuation of the elytra much 
stronger and not so close, so that they are much more shining. Although the 
entire insect (with the exception of its legs) is pitchy-black, the sides, and especially 
the hinder angles of the thorax, are of a lurid tinge, owing to their thinness, and not 
to any actual colour. The anterior angles of the thorax are obtuse ; close behind 
them is a distinct point ; the side is then rounded until the middle, where there is 
another and rather wider point, followed by a shallow emargination, the posterior 
and obtuse point of which forms the upper end of the large notch at the posterior 
angles of the thorax, the lower end of such notch forming at its junction with the 
base a very sharp point. The base itself is slightly emarginate over the scutellum, 
with a wider and more evident emargination on each side, meeting the lower end 
of the notch of the posterior angles. This structure of the base is more or less 
evident in all the species. 
In the male the middle and hinder femora are thickened, with their tibise 
considerably curved ; beneath, the penultimate segment has a rather wide semi- 
circular emargination, and the ante-penult, is slightly hollowed out for its entire 
breadth. The emargination of the penult, segment is not so strong as in M. 
depressus. These male characters appear to have escaped both Erichson and 
de Saulcy. 
4. M. Bellevoyei, de Saulcy, Ann. de la Soc. Ent. de Fr., 4™^ serie, 11 (1862) 
69, pi. 2. This insect appears to be common in certain parts of the London district : 
I get it in my garden here, unaccompanied by any other of its congeners. Its 
characters are very exhaustively given by de Saulcy, loc. cit. (who figures the 
thorax in all its allies), who compai'es it with M. denticollis, to which it is not so 
closely allied as to M. sinuatocollis. He appears to have found it very rarely ; but 
M. Ch. Brisout de Barneville (whom nothing appears to escape), at p. xlviii of the 
Bull, of the same vol. of Ann., records it as equally common with the latter species 
near Paris, and points out its ti'ue affinity. It is, I suppose, in consequence of the 
compai'ison with M. denticollis, that de Marseul (or his " Brachelytrologist ") in the 
2nd Ed. of his Cat. sinks M. Bellevoyei as synonymous with that species : in his 
more recent Cat. he omits it altogether. Either course would appear almost an 
impertinence, in the face of so careful and correct a description as that of do Saulcy. 
The insect was first introduced into British lists by Mr. G. R. Crotch, who, in the 
1st Ed. of his Cat., records it as synonymous with sinuatocollis, and in his 2nd Ed. 
places it (as Bellevoyii), as distinct, next to sinuatocollis. 
M. Bellevoyei is about the size of sinuatocollis, and exhibits the same thoracic 
angulation as in that species, but in a very much less degree. The thorax, moreover, 
is not so wide, and has distinct reddish lateral mai'gins. The entire thorax and 
