Psyche 
[June 
162 
(Schedl, 1940; 1956; 1963), Guatemala (Allotype), Costa Rica 
(Schedl, 1933). 
New records from the Museum of Comparative Zoology collection 
are: 1 Toledo District, British Honduras, 20. IX. 1906, Peck 
col.; 2<J', 1 9 , Lancetilla, Tela, Honduras, Stadelmann col. 
Platypus darlingtoni, n. sp. 
(figs. 3-4). 
Male: head with front slightly concave in the middle, densely 
rugose on all its surface; vertex as rugose as front; with few scattered 
hairs. Antennae of the typical form of the “ costellati” group. Pro- 
thorax densely and finely punctured all over its surface; femoral 
grooves well developed ; median sulcus well marked in the posterior 
third. Elytra: base raised to form sharp ridge, running from suture 
to fifth interstice; interstices carinate in the posterior third of elytra; 
sulci regularly and finely punctured from base to beginning of de- 
clivity ; uneven interstices ending on the upper margin of the declivity 
in blunt spines, the first and third being the longest and best developed, 
subequal in length; the fifth, seventh and ninth less well developed, 
also subequal in length ; the even interstices end on upper limit of 
the declivity, without formation of blunt spines; posterior margin 
of declivity with a well developed tooth on the latero-posterior angle; 
declivity rugose and setose, with an additional tooth between the 
third interstice and the posterior margin. Last abdominal sternite 
with two well developed teeth. Anterior tibiae with 5-7 transverse 
carinae. 
Measurements: total length, 5.5 mm.; maximum width, 1.75 
mm.; elytral length, 3.2 mm.; pronotal width, 1.4 mm.; pronotal 
length, 1.5 mm. 
Holotype, icT, from Toledo District, British Honduras, 20. IX. 
1906, Peck col., in the Museum of Comparative Zoology (M.C.Z. 
n. 3II47)- 
Platypus darlingtoni, n. sp., is the second species of the “costellati” 
group to be recorded from Central America. It is readily distin- 
guished from the other species, mentioned before, which occurs at 
the same locality, by its larger size (P. pulchellus Chapuis is barely 
3 mm. long), and by its differently shaped and armed posterior 
declivity. 
Genus Tesserocerus Saunders, 1836. 
This genus has a typical Neotropical pattern of distribution, with 
its main dispersal center in South America. Of the 22 known species, 
