ISOMIRA. 459 
middle of the elytra, the joints widening a little towards their apex and with their inner apical angle 
rounded, the third and fourth equal in length, ferruginous; prothorax strongly transverse, the sides 
rounded and narrowing from a little before the base, the hind angles obtuse, the basal fovese small and 
shallow, the surface finely and densely punctured; scutellum closely and finely punctured; elytra mode- 
rately long, widest about the middle, the sides very little rounded, finely and lightly punctate-striate, the 
punctures becoming coarser towards the sides and finer and shallower beyond the middle, the interstices 
flat and closely and finely punctured; beneath finely and closely punctured ; legs slender, ferruginous, the 
tarsi similar in both sexes. 
gd. Abdomen with a short but hidden sixth ventral segment, the segment without lateral lobes; the 
central sheath laterally compressed. 
Length 63-73 millim.; breadth 23-32 millim. (¢ 9.) 
Hab. Guatema.a, San Gerdnimo, Duefias (Champion). 
Seven examples. Smaller and more parallel than J. obsoleta, the sides of the thorax 
a little rounded at the extreme base, the elytra with distinct rows of punctures in their 
basal half, the joints of the antenne shorter and less filiform and the prosternum 
narrower ; as in J, obsoleta, the antenne and tarsi are similarly formed in both sexes. 
4, Isomira brevicollis. 
Oblong ovate, rather depressed, piceous-brown, slightly shining, thickly pubescent. Head finely and closely 
punctured; eyes small; antenne piceous, ferruginous towards the base, formed as in J. evanescens: 
prothorax very short, nearly twice as broad as long, the sides narrowed from a little before the base, the 
hind angles obtuse, the basal fovese small and shallow, the surface finely and densely punctured ; elytra 
very closely and finely punctured, with rows of very fine punctures, the punctures scarcely finer than and 
almost indistinguishable from those of the interstices; beneath finely and closely punctured, the meta- 
sternum more sparsely and coarsely so; the rest as in J. evanescens. 
Length 6; millim.; breadth 3 millim. (¢.) 
Hab. Mexico, Jalapa (Hége). 
Though we have but a single female example of this insect I am compelled to treat 
it as distinct from J. evanescens; the elytra are confusedly punctured, the rows of 
punctures being scarcely visible (in J. evanescens, though fine, they are very distinct in 
the basal half); and the thorax is rather more rounded at the sides behind and still 
more strongly transverse. 
5. Isomira (?) ——? 
Hab. Mexico (Sallé, ex coll. Sturm). 
A single immature male, too mutilated to describe, of a species perfectly distinct 
from any other noticed here, and labelled Cistela badia, Sturm, in the Sallé collection. 
This insect is of elongate-ovate shape, rather depressed, with a finely and densely 
punctured thorax, very closely and confusedly punctured and shallowly striate elytra 
(the punctures of the striz not distinguishable from those of the interstices), long and 
slender antenne with the third joint as long as the fourth, and long and slender legs. 
3 NN 2 
