446 
HETEROMERA. 
minutely punctured, the hind angles laterally projecting beyond the base of the elytra and rather obtuse, 
the basal fovew fine and shallow but distinct, the median basal lobe transversely impressed within ; 
scutellum very closely and minutely punctured; elytra with rows of minute punctures, the interstices 
very broad and flat and closely and minutely punctured, the punctures confused with those of the strice ; 
beneath closely and not very finely punctured, the sides of the metasternum with coarser and more 
scattered impressions, the flanks of the prothorax almost smooth within ; legs and antenne ferruginous 
and pubescent, the former finely and rather sparsely punctured. 
g. The lateral lobes of the last ventral segment inwardly curved, gradually narrowing towards the apex. 
Length 7 millim.; breadth (at base of prothorax) 4 millim. (¢.) 
Hab. Mexico, Matamoros Izucar in Puebla (Hége). 
Last 
PITHOLAUS. 
joint of the maxillary palpi elongate triangular, its apical side nearly as long as the outer side and somewhat 
rounded ; last joint of the labial palpi broad ovate, truncate at the apex; mandibles bifid; head short 
and broad, deeply sunk into the prothorax; eyes small and widely separated in both sexes; antenne 
elongate and rather stout, in the male extending considerably beyond the middle of the elytra, joint 3 in 
the male shorter than, but in the female about as long as, 4; prothorax transverse, constricted at the 
sides behind, distinctly margined on all sides, the base truncate in the middle, the hind angles prominent 
and directed a little backwards; elytra truncate and only a little wider than the prothorax at the base, 
short, ovate (almost gibbous in the female), the sides compressed at some distance beyond the middle and 
thence to the apex obliquely converging, punctate-striate ; metasternum exceedingly short ; abdomen in 
the male with a short (but hidden) sixth ventral segment, the latter without lateral lobes ; legs long 
and slender, sparsely pubescent, the penultimate joint of the tarsi lobed beneath; claws pectinate ; body 
obovate, convex, glabrous, apterous. 
This genus contains a single species from the highlands of Guatemala. Pitholaus is 
easily separated from the allied forms by its obovate form, apterous body, long limbs, 
short and broad head, posteriorly constricted thorax, lobed tarsi, and Helopiform 
facies. 
1. Pitholaus helopioides. (Tab. XX. figg.17, ¢; 17a, labium; 17 4, maxilla 
and maxillary palpus.) 
Bright brownish-bronze, glabrous. Head with fine scattered punctures, the transverse frontal depression 
rather deep; antenne fusco-ferruginous, longer and stouter in the male, joints 4-10 of elongate-triangular 
shape ; prothorax convex, much rounded at the sides anteriorly and constricted behind, the hind angles 
rectangular, the basal fovee usually rather deep, the disc shallowly impressed in the middle before the 
base, the surface finely and sparsely punctured ; scutellum almost smooth; elytra with rows of punctures 
placed upon fine shallow strize, the punctures rather coarse towards the base and rapidly becoming very 
much finer posteriorly, the interstices almost flat and with a few widely scattered very minute punctures, 
the lateral margins posteriorly and the apex often more or less testaceous ; beneath shining, the ventral 
surface almost impunctate (a few minute scattered punctures being alone visible) and with very fine and 
shallow longitudinal wrinkles, the metasternum with widely scattered coarsish punctures ; legs more or 
less ferruginous. 
Length 53-64 millim. ; breadth 23-3 millim. (¢ 2.) 
Hab. GuatEMALa, Volcan de Agua 8500 to 10,500 feet, Quezaltenango 7800 feet 
(Champion). 
Numerous examples. 
