i6o 
Psyche 
[June 
carina, running from suture to fifth interstice; interstices normally 
convex; base of third slightly wider, with a few granules (3-4). 
Interstices alternate on the last third of elytra; first one ending at 
declivity, without formation of tooth or spine, but with some few 
granules; third with long spine at declivity; fifth and seventh with 
very much shorter spines, the fifth being the longest of the two; even 
interstices and ninth ending like the first, with a few granules at 
beginning of declivity. Lateral margin prolonged posteriorly to form 
the outer projection of the declivity; between this and the suture, 
another projection, triangular in shape. Abdomen normal. 
Measurements: total length, 4.9 mm.; maximum (elytral) width, 
1.54 mm.; elytral length, 3 mm.; pronotal length, 1.3 mm.; maxi- 
mum pronotal width, 1.45 mm. 
Examined material : 1 cT , collected 7 miles north of San Cristobal 
Las Casas, Chiapas, Mexico (altitude: 2,100 m. ; Km. 1,152 of 
Pan American Highway), 2. VIII. 1964, by J. Shetterly. 
Hopkins did not assign his new species to any of the groups in 
which the genus was divided by Chapuis; Strohmeyer (1912, Coleop- 
terorum Catalogus, Pars 44), lists P. pini as a member of the 
“ trispinati” group, and to this group it has been referred since. The 
study of the type and the present specimen, however, showed that 
P. pini is a member of the “caudati” group. By the presence of two 
posterior projections on each elytron, this species is easily distinguished 
from all the other members of the group. Both localities where P. 
pini has been collected (Chaleo, Mexico — misspelled Chaleo by 
Hopkins — and San Cristobal Las Casas, Chiapas) are situated at 
or above 2,100 m., suggesting that the species may be restricted to 
higher altitudes. 
“ costellati” group 
Platypus pulchellus Chapuis, 1865. 
Platypus pulchellus Chapuis, 1865, Monogr. Platyp. :230, fig. 134. Holotype 
$, San Juan Baptista (Villa Hermosa), Tabasco, Mexico; Blandford, 
1896, Biol. Centr. Amer., Col., 4(6) :1 12. Allotype 9, El Zapote, Guate- 
mala. 
This species is widespread over Central America, and one record 
is known from Venezuela (Schedl, 1960b). It has already been 
recorded from several localities (summarized on fig. 9) in Mexico 
Explanation of Plate 11 
Fig. 1, Platypus pini Hopk., lateral view ; fig. 2, P. pini Hopk., dorsal 
view; fig. 3, P. darlingtoni, n. sp., lateral view; fig. 4, P. darlingtoni, n. sp., 
dorsal view; fig. 5, T. nevermanni Schedl, lateral view; fig. 6, T. never- 
manni Schedl, dorsal view. 
