258 SUPPLEMENT. 



the Eridomychidae, but it must be admitted it has less claim than the other genera 

 to a place there. The tarsi are simply four-jointed, but the remarkable insects which 

 compose this genus have neither the general appearance nor structure of the family. 

 They present rather the suggestion of an abnormal form of Cryptophagidae, and have a 

 certain relationship to the European genus Pleganophorus, now usually placed among 

 the Colydiidae. 



The distribution of the five species recorded is no less remarkable: one from 

 Madagascar; one widely spread in the East (Burma, the Philippine Is., Java, the 

 Nicobar Is., &c.) ; one from Burma ; one obtained from gum-copal ; and one from 

 Tropical America. 



1. Trochoideus americanus, 



Trochoideus americanus, Buquet, Eev. Zool. 1840, p. 174 x ; Westw. Trans. Linn. Soc. xix. p. 45 2 . 

 Trochoideus goudotii, Guer. Rev. et Mag, Zool. 1857, p. 191 ( ? ) s . 



Hab. Panama, Volcan de Chiriqui 2000-4000 feet (Champion). — Colombia, San 

 Antonio near Bogota J 2 , Tolima 3 . 



Of this curious insect a male and two female examples were found by Mr. Champion 

 in Chiriqui. The females have one more joint in the funicular portion of the antennae 

 than the male, and the apical joint is much less massive and more pubescent. The 

 colour in our examples is uniformly fulvous. The insect appears to be found under 

 the bark of decaying trees. 



CRYPTOGNATHA (p. 181). 

 Cryptognatha auriculata (p. 182). 



To the localities given, add : — Guatemala, Panzos and San Geronimo in Vera Paz 

 (Champion)', Panama, Bugaba, David, Caldera, Volcan de Chiriqui (Champion). 



About a dozen specimens from Panama are, I think, to be referred to this species. 

 They are nearly unicolorous, the head and front angles of the thorax being paler in 

 some specimens, which may be the males, and the legs are paler yellow than the upper 

 surface. The elytra have the juxta-sutural row of subcutaneous fuscous dots often 

 present, and continued parallel to the base ; the punctures are very faintly and 

 obsoletely serial near the margin, in an extremely shallow sulcus. The front tibiae, in 

 what I suppose to be the male, have their outer edge compressed, so as to appear to 

 have a membranous projection, widest near their base, and the middle and hind tibiae 

 are emarginate on their outer sides. Single examples from Teapa and Panzos 

 respectively are evidently males, and have the head wide and concave, and the thorax 

 with the front margin as well as the sides white. 



Mr. H. H. Smith has met with the species at Teapa, whence I have already 

 recorded it. 



