218 The Species of Amblychila, [ZOE 
Lolium perenne 1,. 
Flordeum murinum I,. 
Equisetum arvense 1, Abundant on the clay of the levee. 
Woodwardia radicans Smith. : 
Asplenium Filix-foemina Bernh. 
Aspidium rigidum var. argutum Raton. Ferns were observed 
only about the levee. 
Mosses, Liverworts and Lichens are conspicuous only by 
their absence, but fungi— parasitic on living plants— abound. 
THE SPECIES OF AMBLYCHILA. 
(With Plates xxviii, xxix, ] 
BY J. J. RIVERS. 
Are there three species of Amblychila, or two, or only one? 
Having before me the three forms that have received names, 
and having also Say’s and Reiche’s descriptions and also Thom- 
son’s ‘‘ Monographie des Cicindelides ” together with my descrip- 
tion of Am. Baroni, lam well prepared as far as material is con- 
cerned to give a resumé of the luckless paths into which 
Amblychila cylindriformis Say, A. Picolominit Reiche, and 4. 
Baroni Rivers have been made to travel. 
In 1823 Say published his description of _4. cylindriformis, in 
1839 another form which belonged to the Dupont collection was 
described and figured under the name of 4. Picolomingi Reiche. 
This insect was said to have been found near the bay and port 
of San Francisco, California, in latitude forty-eight degrees north. 
The locality is considered altogether an erroneous citation, as San 
Francisco, Cala. is in thirty-seven degrees, forty-seven. The diffi- 
culty in the way of coming to an agreement in the identification of 
these insects is the fact that both our most learned coleopterists have 
pronounced Dupont’s examples to be 4. cylindriformis of Say, 
while Reiche and Chaudoir consider them or some of them as 
a distinct species. 
There appears much confusion concerning the identity of 4. 
Picolominii. 'Thomson’s monograph gives a copy of the 
