532 SUPPLEMENT. 
1. Phthora armata, (Tab. XXIII. figg. 2,¢ ; 2 a, antenna.) 
Diedus punctatus ?, huj. op. p. 144 (nec Lec.). 
Moderately elongate, subparallel, very convex, castaneous, shining. Head moderately coarsely, rather thickly 
punctate, transversely depressed anteriorly, the sides of the front strongly, subangularly raised in the 
male; prothorax broader than long, transversely convex, subtruncate at the base and rather feebly 
emarginate at the apex, the sides feebly rounded and converging in front, and slightly converging behind, 
the lateral carina sharp and a little reflexed, the surface moderately coarsely, closely punctate, the apex 
depressed in the middle in the male; elytra twice as long as, and slightly wider than, the prothorax, 
parallel in their basal half, deeply striate, the strie with moderately coarse, approximate, crenate 
punctures, which become much finer towards the apex, the interstices strongly convex, and with minute 
scattered punctures, the humeri angular. 
Length 33-33, breadth 13-12 millim. (¢ 9.) 
Had. Guatemata, Chilasco and Zapote (Champion). 
Two examples. More convex than P. crenata and P. americana, the thorax less 
parallel at the sides behind, and with the lateral carina less prominent and not so 
strongly reflexed. This insect is exceedingly like Diedus punctatus, except in the 
form of the antenne. The sexes differ in the form of the head and thorax. 
¥. Phthora elongata. 
parallel, moderately convex, pitchy-black, shining; the oral organs and antenne rufous, the legs 
Head thickly and rather coarsely punctured, broadly, transversely 
the sides parallel from the 
Elongate, 
pitchy-brown, the tarsi paler. 
depressed in front; prothorax a little broader than long, transversely convex, 
middle to the base, rounded and slightly converging in front, the base subtruncate, the apex rather feebly 
emarginate, the lateral carina moderately prominent, sharp, and narrowly reflexed, the surface rather 
coarsely and irregularly punctured, the punctures sparse on the disc, close at the sides; elytra twice as 
long as the prothorax, and slightly wider than it, parallel to beyond the middle, deeply striate, the strize 
with moderately coarse, approximate, crenate punctures, which become finer towards the apex, the 
interstices strongly convex and with minute scattered punctures, the humeri angular. 
Length 42, breadth 13 millim. 
Hab. Mexico, Las Vigas in Vera Cruz (flohr). 
More elongate and less convex than P. armata; the thorax longer, with the punc- 
tuation sparser and more irregular on the disc. One example. 
ZYPCTES. (To follow the genus Phthora.) 
Mentum trapezoidal; last joint of the maxillary palpi oblong, subsecuriform, that of the labial pair oblong- 
ovate; ligula entire; mandibles bifid at the apex; labrum prominent; head very broad, large, deeply 
sunk into the prothorax, the epistoma truncate and confounded with the front, the sides of the front 
rounded and converging, not prominent; eyes entire, rather finely granulated, very small, rounded, 
lateral, scarcely visible from above ; genx with asinuous, longitudinal, sharply defined juxta-ocular groove 
for the reception of the basal joints of the antenna ; antenne short, joints 1-8 closely articulated—1 and 2 
stout, 2 stouter than and nearly as long as 3 and 4 united, 3-8 short, gradually increasing in width, and 
becoming more transyerse,—9-11 forming a stout 3-jointed club—9 and 10 very strongly transverse, twice 
as wide as 8, 11 rounded at the tip, twice as long as 10; prothorax short, very closely fitting to the base of 
the elytra, and at the sides forming a continuous outline with it, the sides sharply margined ; scutellum 
minute, transversely triangular; elytra about two and a half times as long as the prothorax, regularly 
