54 Journal New York Entomological Society. lvoI. viil 



4 — Prothorax as in Honiaiisa, the base transverse and bisinuate, the angles right, not 

 rounded and somewhat prominent, tlie sides arcuate and apical angles very 

 broadly rounded ; basal tergites as in Soliiisa, not impressed at base ; eyes smaller 

 than usual, the antenna; rather strongly incrassate, the tenth joint probably formed 

 by the fusion of two, but not relatively longer than in Hoinosusa ; infraocular 

 ridge tine but abruptly and strongly elevated, the additional ridges wanting ; 

 basal joint of the hind tarsi as long as the last and a little longer than the next 

 two combined ; pubescence moderate in length as in Homaiisa ; [type expansa 

 Lee] Decusa, gen. nov. 



The type of Soliusa may be briefly described as follows : — 



Moderately stout and depressed, the head nearly three-fifths as wide as the prothorax, 

 with the eyes slightly prominent ; antennae but little longer than the width of the 

 body ; prothorax three-fourths wider than long, equal in width to the elytra and 

 distinctly shorter, the sides rotundato-convergent anteriorly ; abdomen at base 

 nearly as wide as the elytra, acuminate, the sides straight ; fifth tergite at apex 

 three-fifths as wide as the first ; color throughout pale brown, the abdomen a little 

 darker, the surface rather shining and quite feeble punctulate ; pubescence con- 

 spicuous but subdecumbent as usual. Length, 1.75 mm. ; width 0.63 mm. 

 New York crinitula, sp. nov. 



Individuals seem to be rare in all of these genera and probably have 

 throughout a more or less complete symbiosis with ants. Mynnobiota 

 crassiconiis and Decusa expansa have both been sent to me by Mr. 

 Wickham as having been discovered in ant-nests. 



Mr. Wasmann (Tijd. v. Ent. XLI), states that Myrmohiota Csy. 

 (Col. Not. V, p. 594) is identical with Iloiiuviisa Krtz., citing speci- 

 mens collected by Mr. Wickham and forwarded to him through Mr. 

 Schmitt. There is manifestly some mistake in identification, how- 

 ever, and my friend's remarks must refer to the species here described 

 under the name Soliusa crinitula or to one closely al- 

 lied thereto \ but if the latter surmise prove to be cor- 

 rect, I am forced to differ in opinion concerning the 

 status of that species, for a study of the basal tergites 

 of the abdomen, form of the mesosternum and thor- 

 acic base, and other characters, show that crinitula. 

 Fig. I.— Prothorax also, is gcnerically distinct. In regard to Mymwtu'ota, 

 Myyiionota an ^]-jgj.g ^^^ ^g j-^q (Joubt of its wide isolation from IIo- 

 nuvusa, as an inspection of the small accompanying 

 diagrams of the prothorax will abundantly demonstrate, the upper 

 figure referring to ^lyrniobiota and the lower to Honuvusa acuminata. 

 That Mr. Wasmann has fallen into an error in identification, is further- 

 more evident at once from his statement that crassicornis (Wasm. nee 



