FALAGONTIA. 213 
well-known European Staphylinus canaliculatus, Fab., to which Rey (Hist. Nat. Col. 
Fr., Brév. Myrméd. i. p. 93) has recently restored the old generic name Drusilla; but 
the Mexican insect appears sufficiently different in the details of the structure of the 
breast to entitle it to generic distinction. The front of the mesosternum is simply 
margined as in other Myrmedonie, and is without the large development of the margin 
existing in Drusilla; the mesosternum is rather less produced in the middle between 
the coxee, and is truncate behind; and the intercoxal isthmus is longer. ‘The structure 
of the prothoracic side piece and of the tarsi appears to be identical in the two genera. 
The second species of the genus, I. crassiventris, is no doubt very closely allied to 
F. mexicana; but the very mutilated and fragile condition of its only known exponent 
does not allow me to state that it is certainly congeneric. 
1. Falagonia mexicana. (Tab. V. fig. 24.) 
Gracilis, testaceo-brunnea, antennis rufis, pedibus testaceis ; capite, thorace elytrisque opacis, his dense asperato- 
punctatis; abdomine levigato, nitidulo. 
Long. 5 millim. 
Hab. Mexico, Jalapa (Flohr), Guanajuato (Dugeés, coll. Sallé). 
Antenne elongate and rather slender; third joint longer than second, fourth shorter 
than fifth ; after this, each rather shorter and broader than its predecessor; tenth about as 
long as broad ; eleventh acuminate, scarcely so long as the two preceding together. Head 
narrow, suboval, quite dull, obsoletely punctate; thorax elongate, but little narrowed 
behind, so being nearly oblong in form; the surface dull, densely punctured with 
a peculiar raised punctuation, obscurely transversely impressed in the middle in front 
of the scutellum, very obsoletely channelled along the middle. lytra rather shorter 
than the thorax, with a similar scabrous sculpture. 
The male has the lateral margins of the hind body flatter than those of the female ; 
and the third and fourth dorsal segments bear each a rather large deep depression; the 
sixth segment is somewhat deplanate along the middle; and the seventh has on the 
middle a very obscure tuberculiform elevation. 
Two individuals (very mutilated) of this species have been sent me by Mr. Flohr; and 
a third stood in M. Sallé’s collection under the name “ Falagria mexicana,” K. Dugés. 
This latter, a female, is figured. 
2. Falagonia crassiventris. 
Nigricans, nitidula, antennarum basi (tibiisque?) testacea ; antennis elongatis, versus apicem latioribus ; capite 
angustulo ; prothorace elongato, dorso depresso crebriusque granuloso-punctato; elytris quam thorax fere 
brevioribus, irregulariter granuloso-punctatis ; abdomine lavigato nitidulo, subtus convexo. 
Long. 33 millim. 
Hab. Guatemaua, Cahabon (Champion); Panama, Bugaba (Champion). 
Antenne elongate, a good deal thicker outwardly, nearly black in the middle, yellow 
