422 TROGOSITIDA. 
In this species the interruption of the basal margin of the thorax is not so conspicuous 
as. it is in most others of this section; and if this character were not correctly observed 
the species would be supposed to be near 7. rufolimbatus and its allies in the next 
section. It is not at all likely to be mistaken for any of our species with interrupted 
basal margin. 
T. yucatanicus varies a good deal in size and colour; the antenne are short, and the 
aree of sensitive pubescence on the club very small. Some of our examples agree 
perfectly with M. Léveillé’s description, and he has also identified the species fur us 
by comparison with his type. 
Group 2.—Prothorax nearly or quite as long as broad. (Species 14-17.) 
14. Tenebroides bipustulatus. 
Trogosita 2-pustulata, Fabr. Syst. Eleuth. i. p. 152°. 
Tenebrioides bipustulata, Reitter, Verh. Ver. Briinn, xiii., Abhandl. p. 67. 
Tenebriotdes impressifrons, Reitter, loc. cit. p. 66°. 
Hab. Mexico, Temax in North Yucatan (Gawmer); Guatemata, El Tumbador, 
Pantaleon, Zapote (Champion); Panama, Volcan de Chiriqui (Champion).—Souru 
America }, Colombia °, Cayenne 2, Brazil? ; ANTILLES 3. 
This distinct species varies much in colour, being sometimes entirely shining black, 
while in other cases the elytra and the ventral segments are more or less broadly 
marked with red. M. Léveillé has already pointed out (Bull. Soc. Ent. Fr. 1889, 
p. vill) that spotted specimens are not distinct from those that are entirely black: I 
have no doubt he is correct in this. Mr. Champion found both forms at Pantaleon. 
Whether the species is really the Trogosita bipustulata of Fabricius is very doubtful, 
as he states that the thorax is canaliculate in front, while there is not the least trace 
of such a character in our insect. 
15. Tenebroides sulcifrons. 
Trogosita sulcifrons, Jacq.-Desv. in Sagra’s Hist. fisica, polit. y nat. de Cuba, vii., Ins. p. 105? ; 
French edit. p. 253. 
Tenebrioides sulcifrons, Reitter, Verh. Ver. Brinn, xiii., Abhandl. p. 66”. 
Hab. Mexico, Jalapa (Hége); Guaremata, El Tumbador (Champion); Panama, 
Volcan de Chiriqui (Champion).—Sovutu America, Brazil?; Anrinizes, Cuba? 2. 
I refer to T. sulcifrons, with much doubt, three specimens from our region ; these 
three individuals were found singly in widely separated localities, and are far from 
agreeing satisfactorily in their details. They agree in most points with the characters 
pointed out as distinctive of 7. sulcifrons, and if that species proves to be very variable 
they may perhaps really belong to it. 
