Among a very interesting collection of Mexican and other Hemiptera sent to me by Mr. Samuel Henshaw, Curator of Boston Society of Natural History, for identification, I find two species new to science and peculiar to genera never before detected in North America, although both are well represented in the European fauna.

In the first genus, Stenocephalus A. & S., in Europe, four species are known, principally peculiar to the southern portions of that continent.