LONGICORNIA. 283 
Undoubtedly the female of 0. xantho, but whether a colour-variety of the species or 
not cannot be judged from a single example. 0. albicollis differs similarly in the form 
of the elytra in the two sexes. 
19. Ophistomis hirsutus. 
Linearis vel subcylindricus, pilis elongatis et erectis dense vestitus; rostro basi thoraceque fulvo-testaceis, hoc 
medio infuscato ; elytris nigris vel fusco-nigris, sutura plus minusve pallide fusco-marginata; capite ante 
oculos valde elongato et angusto, levi; occipite subtiliter sparsim punctulato ; thorace sat late campanu- 
liformi ; elytris apud suturam haud depressis, creberrime punctatis, apice oblique truncatis; antennis 
fusco-testaceis ; coxis femoribusque (apice excepto) et interdum abdominis apice pallide testaceis. 
dg. Segmentum ultimum ventrale latissime concavum Jlateribus elevatis, ultra segmenti apicem in lobulum 
angustum producto. 
Long. 5lin. g 9. 
Hab. Mexico, Cordova (Sailé). 
20. Ophistomis(?) fulveolus. (Tab. XX. fig. 7.) 
§. Elongatus, subcylindricus, dense breviter incumbenti-pubescens, aurantiaco-fulvus ; rostro apice, antennis, 
femorum et tibiarum apicibus nigris; capite ante oculos elongato et angusto, thorace sat late campanuli- 
formi; elytris basi quam thorax vix latioribus, postice haud angustatis, equaliter convexis, apice oblique 
et obtuse truncatis, supra crebre punctulatis. 
Antenne fere sicut in Ophistomi Q , articulis 3°-4™ sat elongatis et gracilibus, sed paullo longius hirsutis; tarsi 
postici articulo basali longissimo. 
Long. 5} lin. Q. 
Hab. GuaTemaLa, San Juan in Vera Paz (Champion). 
CHORIOLAUS (to follow the genus Ophistomis, p. 40). 
Ophistomi et Euryptere affinis. Corpus oblongum, postice plus minusve dilatatum. Caput ante oculos haud 
prolongatum, sed quam in Lepturis veris angustius. Antenne filiformes, basi haud longe pilose, articulis 
3° et 4° gracilibus nec perspicue abbreviatis. Thorax campanuliformis. Elytra nec depressa nec costata. 
Tarsi postici graciles, articulo basali elongato. 
A genus formed for the reception of certain species which are intermediate in their 
characters between Ophistomis and Euryptera, and cannot be included in either without 
rendering their definition impossible. In most of their characters they agree with the 
genus Chontalia, which has similar antenne, the third and fourth joints being linear 
and not shorter than the remainder taken singly; but in Chontalia the anterior coxe 
are much less exserted, the muzzle longer, and the general form and facies different. 
Only females are at present known. | 
1. Choriolaus #grotus. 
Angustus, sublinearis, dense breviter erecte pilosus, fulvo-testaceus; palpis, antennis, tibiis, tarsis, pectore et 
ventre (segmentorum marginibus exceptis) nigris; elytris crebre punctulatis, versus- apicem paullo dila- 
tatis, dorso subplanatis, apice obtusissime rotundatis. 
Long. 4 lin. 9? 
Hab. Mexico, Peras (Sal/é). 
One example only. 
202 
