16 ADEPHAGA. 
PACHYDRUS. 
Pachydrus, Sharp, Trans. Roy. Dubl. Soc. n. s. ii. p. 850. 
Hyphidrus (ex parte), Aubé, Spec. Gén. vi. p. 450. 
This genus is restricted to Tropical America and the Antilles. At present only six 
species are known. 
1. Pachydrus cribratus. 
Pachydrus cribratus, Sharp, Trans. Roy. Dubl. Soc. n. s. ii. p. 388’. 
Hab. Mxxico!, Guadelupe. 
2. Pachydrus politus. 
Ovalis, convexus, nitidus, testaceo-ferrugineus, capite postice, abdominis segmentis ultimis elytrisque fuscis ; 
his plaga laterali pone humerum testacea, subtiliter (versus suturam obsolete, versus latera distinctius) 
punctatis. 
Long. 2, lat. 14 lin. 
Hab. GuateMALA, Paso Antonio, 400 feet (Champion). 
Var. Paulo latior, colore obscuriore, punctatura (presertim in thorace) minus obsoleta. 
Hab. Mexico, Vera Cruz (Sal/é). 
The head is somewhat finely but quite distinctly punctured, the thorax very sparingly 
and obsoletely. The wing-cases have, in addition to the yellow posthumeral mark, the 
apex minutely pale. The body beneath is shining and impunctate, except that the 
sides of the breast are somewhat obsoletely but yet rather coarsely punctate. I am 
not able to detect any external sexual characters. 
The Mexican variety may possibly prove to be a distinct species ; but if so, it must be 
an extremely closely allied one; it probably approaches closely the Cuban Hyphydrus 
obniger, Chev. 
DESMOPACHRIA. 
Desmopachria, Bab. Trans. Ent. Soc. Lond. iti. 1841, p. 16; Sharp, Trans. Roy. Dubl. Soc. n. s. 
li. p. 851. 
About twelve species are known of this genus; they are all minute insects, confined, 
so far as we know, to the continental portions of the New World, where they range 
from Uruguay to the United States of North America. Certain species supposed to 
occur both in Brazil and North America have not yet been detected in the intervening 
Central-American regions. 
1. Desmopachria variegata. 
Brevis, lata, subrotundata, nitida, rufo-testacea, capite obscuriore, prothorace basi in medio abdomineque 
segmentis tribus ultimis nigricantibus; elytris testaceis, signatura lata irregulari circa suturam nigro- 
