1967] 
A ndrews — Ptinus 
199 
British guiana: Rio Essequibo (source), J. Ogilvie collector 
[MCZ]. Guatemala: Duenas, G. C. Champion, B.C.A. Coll. III. 
(2)., Syn-type [BM]. 
Ptinus costaricensis, new species 
(Figs. 12-14) 
Holotype. — , costa rica: Guanacaste Prov., Taboga, 6 mi. S., 
6 mi. W. Canas, io° 19' N., 85° 09' W., Feb. 17, 1967, reared 
from coati scats [MCZ, No. 31551]. Allotype, $, same date and 
locality, sweeping, river-bottom forest [MCZ]. 
Paratypes. — 2, same data as holotype [MCZ: 1 ] ; 4, same lo- 
cality as holotype, Feb. 15, 1967, sweeping, river-bottom forest 
[MCZ: 1]. 
Description : Sexual dimorphism absent. Reddish-brown, head 
and prothorax black with black extending into the anterior half of 
the elytra along the midline; clothed with gold setae; elytra with 
small preapical and prebasal streaks of white recumbent hairs. Total 
length: 1.90-2.65 mm. Greatest width (across humeral callosities) : 
.78-1.15 mm. 
Holotype cT : Total length: 2.65 mm. Greatest width (across 
humeral callosities) : 1.13 mm. Head t eyes and antennae as in 
P. latefasciatus. Pronotum (Fig. 12) shiny black, 1.2 times as long 
as wide, grooves and setation as in P. latefasciatus but without short 
white hairs on gibbosities. Scutellum and wings as in P. latefascia- 
tus. Elytra 1.7 times as long as wide, sides parallel, humeral cal- 
losities strongly developed and raised; diameter of strial punctures 
at middle of elytra about 0.5 times as great as interspace width ; 
inclined setae of strial punctures extending to next puncture, erect 
setae of interspaces longer than in P. latefasciatus , those of odd 
intervals 1.5 to 2 times longer than those of even intervals; recum- 
bent white hairs of preapical streak extending from fourth to eighth 
interval, prebasal streak extending from the second to the fourth 
interval, and slightly posteriorly, from the fifth to the eighth in- 
terval. Metasternum clothed with intermingled gold and white hairs 
extending into the lateral areas of the metasternum. Abdomen and 
metacoxae as in P. latefasciatus. Legs reddish-brown, otherwise as 
in P. latefasciatus. Genitalia (Figs. 13, 14) relatively shorter than 
in P. latefasciatus , medium lobe narrowed at the apex, lateral lobes 
rounded apically, not closely approaching medium lobe, basal piece 
with length and width subequal. 
This species is extremely similar to P. latefasciatus in proportions 
and in the structure of the pronotum. P. costaricensis is the smaller 
