282 SUPPLEMENT. 
forests of the “tierra caliente” and in the hottest sunshine; it has a peculiar dancing 
mode of flight, almost like that of a gnat. He took a very large number of specimens, 
nearly all of which prove to be males. The female resembles, in the markings of the 
thorax and elytra, the same sex of O. beléi; but in other respects it is widely different, 
being much smaller and having much shorter antenne, the fifth joint of which is some- 
what shortened and thickened towards the apex, whereas the same joint in 0. belti is as 
long and as slender as the third. 
16. Ophistomis pectoralis. 
O. saltatort proxime affinis, elytrorum signaturis simillimis. Differt capite et thorace supra et infra meso- et 
metosternisque medio, nigris. Capite ante oculos multo breviori, transverso; thorace confertim punctu- 
lato, opaco; abdomine pectoreque lateribus rufis nitidis immaculatis; pedibus nigris, femoribus (apice 
excepto) flavis. 
do. Segmentum ultimum ventrale sat breve, dimidio fere basali integro, deinde profunde concavum lateribus 
compressis (nec lobiformiter elevatis), apice in spinam productis. 
Tong. 53 lin. go. 
Hab. Mexico, Cordova (Sallé). 
Two male examples. Ticketed “JZ. scalaris, Sturm,” MS., in the Sallé collection, a 
name which it is not advisable to adopt, as it has been applied by Say to a species now 
referred to an allied genus. 
17. Ophistomis felix. (Tab. XX. fig. 5.) 
9. O.saltatori 2 differt solum capite antennarumque articulis 7°-9™ 10°que basi, fulvo-testaceis ; elytris maculis 
marginalibus utrinque quatuor, humeris guttaque discoidali versus scutellum, nigris. 
Long. 7 lin. @. . 
Hab. Panama, San Feliz (Champion). 
One example only. Found in company with 0. saltator; it has a long but not 
narrow muzzle as in that species, of which it is possibly a colour-variety. 
18. Ophistomis xantho. 
Minor, postice parum angustatus, subopacus dense incumbenti-pubescens, niger ; rostro basi, thorace supra (vitta 
dorsali nigra excepta), dimidio basali elytrorum, femoribusque (apice excepto) aurantiaco-ochraceis; capite 
ante oculos modice elongato; thorace campanuliformi ; elytris apud suturam haud depressis, postice vix 
angustatis, basi quam thorax parum latioribus, apice oblique et obtuse truncatis, supra crebre punctulatis. 
¢. Segmentum ultimum ventrale mox a basi late concavum, lateribus compressis (nec lobiformiter elevatis), 
apice obtusis. 
Long. 5 lin. ¢. 
Hab. Muxico, Oaxaca (Sallé). 
2 (var.?). Postice nullomodo angustatus ; elytris oblongis convexis, apice sicut in g truncatis ; pube densa 
sericeo-fulva; thorace sicut in ¢ univittato, sed elytris, corpore subtus toto, tibiis tarsisque basi 
aurantiaco-ochraceis. 
Long. 44 lin. 
Hab. Mexico, Oaxaca (Sallé). 
