446 . Mr. H. W. Bates on the Longicorn Coleoptera 
many of the heads of M. stolonifer were composed of a mass of 
minute polymorphic cells (Ame@be), which, after haying been 
placed in water on a slide, soon separated from their globular 
aggregation, and crept away from each other under moto-plastic 
forms, which forms, under other circumstances, I assume, would 
have respectively been surrounded by firm, sporidious capsules, 
and, on the latter bursting in development, would have come 
forth as propagative amcebous germs or embryos, like those 
which come from the sporidia of the Myxogastres, with which 
family Corda has already placed the Mucoridex, though not 
probably from the circumstance just mentioned, but from their 
general resemblance (Corda, Icones Fungorum, p. 19; and 
Mucor stolonifer seu Riizopus nigricans, p. 20, tab, xu. fig, 
83)*, 
XLVIII.—Contributions to an Insect Fauna of the Amazon Valley. 
Corzorrera: Lonaicornes. By H. W. Barus, Esq. 
{Continued from p. 405.] 
Group Anisocerine. 
Genus TricgonorePius, Thoms, 
Thomson, Class. des Céramb. p. 339. 
Turis genus is an aberrant form in the group Anisocerine, differ- 
ing from most of the other genera in haying the terminal joint of 
the antenne, compared with the penultimate, of normal length, 
and the elytra obtusely truncated at the tip, instead of rounded. 
It resembles the genus Chalastinus so much in general form that I 
have thought it better to place it in this group, Thethird and three 
following joints of the antennz are slender and slightly thickened 
at the tips; this indicates an affinity with the Anisocerinz, where 
the thickening of the tips of the antennal joints is a very general 
character. The typical species of Trigonopeplus (T. signatipennis, 
Thoms,, a native of South-east Brazil) has a deep semioval 
notch in the middle of the epistome—a singular peculiarity of 
* Familiar examples of these fungi are given, that the reader may the 
more easily procure them for examination. Abundance of the Myxogas- 
tres may be found on the dead wood in the building-timber and fire-wood 
yards during the monsoon, among which is the Afithalium or creeping- 
fungus,’ which, under the microscope, by transmitted light, affords one of 
the most wonderful objects in the world. To obtain this, look among the 
chips and sawdust of the astringent woods during the “raims,” and 
having found a yellow- or a brown-coloured slime, take a piece of it, about 
half the size of a pea, and place it in a watch-glass with a little water; 
afterwards put the glass in a shaded or dark place for a few hours, when 
the Aithalium will, if young and fresh, have passed into an arborescent 
form fit for observation. 
