452 BRUCHIDES. 
24. Bruchus difficilis. 
Parvus, niger, pallide ochraceo-vestitus; antennarum basi, pedibus elytrisque rufis, his sutura margineque 
exteriore nigro-signatis; prothorace conico; antennis parum elongatis, intus subserratis; femoribus 
posterioribus dente parvo denticulisque tribus armatis. 
Long. 2 millim. 
Hab. Guatumata, San Gerénimo (Champion). 
This species is extremely similar to the larger and darker individuals of B. ruficoxis, 
but differs as follows: it is of superior size, with less abbreviate ventral rings, dark coxe, 
and a rather larger tooth followed by three denticles on the hind femora. The male 
has the antenne evidently longer than they are in the female, with a very much larger 
fourth joint. The spur of the hind tibia is of moderate length and slender, similar to 
that of B. ruficovis. Only three examples are before me. 
25. Bruchus argutus. 
Parvus, niger, ochraceo-vestitus ; elytris rufis, sutura margineque exteriore argute nigro-maculatis; antennis 
pedibusque testaceis, femoribus posterioribus nigris; prothorace conico; antennis brevibus; femoribus 
posterioribus dente parvo denticulisque duobus instructis; tibiis posterioribus apice longius calcarato. 
Long. 24 millim. 
Hab. Mexico, Jalapa (Hége); Guatemata, San Gerénimo, Duefias, Chiacam, Zapote 
(Champion). 
This species is excessively similar to B. ruficoxis and B. difficilis, but is undoubtedly 
distinct ; compared with the former it is found to be larger, with the hind femora and 
the coxee dark, the armature of the femora less minute, and a much longer spur on the 
hind tibia; this last character is diagnostic of this species amongst the immediate 
allies. The antenne are quite short, with the penultimate joints evidently transverse 
and the fourth joint not larger than the third. Four typical examples have been 
received, and if,as I presume, from a minute difference in the ventral rings, I have both 
sexes before me, then the sexual characters are very slight. The ventral rings are less 
abbreviate than they are in B. rujficoxis. 
The examples from Jalapa, Zapote, and Duefias are in each case unique, and are 
referred to this species because I see no good structural characters to separate them, 
but it is quite possible they represent three other very closely allied species. | 
26. Bruchus argillaceus. 
Parvus, niger, minus tenuiter ochraceo-vestitus; pedibus rufis, pygidio rufescente; antennis fusco-rufis, basi 
dilutiore, articulo tertio quam secundus conspicue longiore; prothorace conico; elytris interdum basin 
versus rufo-signatis ; femoribus posterioribus dente gracili denticulisque duobus instructis. 
Long. 23 millim. 
Hab. Guatemaa, Duefias, Capetillo (Champion). 
This is an obscure insect allied to B. obsoletus, Say, but smaller, with the pubescence 
