LEPTOCHIRUS. 7389 
of three subequal teeth ; the vertex has large punctures on its anterior part, but there 
are no punctures on the middle; the rugose sculpture at the base of the ventral 
rings is only very slight in extent. 
10. Leptochirus quadricollis. 
Nigerrimus, sat depressus ; vertice anterius in medio punctis duobus approximatis parum conspicuis notato ; 
mandibulis dente superiore introrsum vergente, margine interne incrassato et sinuato, dente supero- 
basali minuto ; antennis gracilibus. 
Long. 20 millim. 
Hab. Mexico (Sallé, ex coll. Sturm), Jalapa (Hoge). 
This species is readily distinguished from L. mexicanus not only by the characters 
mentioned in the diagnosis, but by several others: the supero-basal tooth of the 
mandible is here merely an acute tubercle, while the superior tooth is very large, 
strongly curved inwards, and with its inner margin sinuate; the lower internal tooth of 
the right mandible forms a large quadrate mass ; there are no punctures on the middle 
of the vertex, and the two approximate punctures or depressions on the front are small ; 
the inner margin of the two frontal depressions is but little elevated; and the rugose 
sculpture is not present at the bases of the ventral rings. The front coxe are distinctly 
divided; the antenne are longer than in either of the allied species, and the thorax is 
remarkably elongate. 
11. Leptochirus mexicanus. 
Leptochirus mexicanus, Er. Gen. et Spec. Staph. p. 826°. 
Nigerrimus, sat depressus ; vertice ad apicem punctis duobus approximatis, in medio duobus distantibus notato ; 
mandibulis dente superiore introrsum parum vergente, dente supero-basali valde elongato; antennis sat 
gracilibus. 
Long. abdomine extenso 15 millim. 
Hab. Mexico ! (Flohr), Cordova (Hoge). 
This is the species with which Erichson’s description! best agrees. The punctures 
along the middle of the vertex are sometimes four in number, and placed in a transverse 
line ; sometimes two, as described by Erichson. The inner portion of the margin of the 
two frontal depressions is remarkable for its great elevation; the interior basal or molar 
tooth of the left mandible is divided into three smaller teeth, the lower or posterior 
tooth being, however, very short and obtuse: the corresponding tooth on the right 
mandible is bidentate ; the front coxe are extremely approximated; and the first four 
ventral segments have a well-marked band of rugose sculpture at the base. 
Mr. Flohr sent me three examples many years ago without any special locality, and 
I have for many years possessed a fourth from an old collection. Hoge found a single 
immature example, piceous, with the head and thorax red, which I believe to be the 
same species; it, however, has the supero-basal tooth of the mandible shorter, and 
there are some other slight distinctions. These are all the specimens I have seen. 
5 BB2 
