OPHISTOMIS. 39 
2. Ophistomis belti. (Tab. IV. fig. 22.) 
Ophistomis beltii, Bates, Trans. Ent. Soc. 1872, p. 182. 
Hab. Nicaracva, Chontales (Belt). 
_ One example only is yet known of this species; the following nearly allied form, 
however, is clearly distinguishable from it :— 
3. Ophistomis emaciata. 
Angusta, gracilis, sparsim decumbenti-setosa ; capite nigro; antennis nigris, articulis 6°-10™ incrassatis flavis ; 
thorace angusto, antice gradatim attenuato, dorso sparsim punctato, nigro nitido, macula basali vittaque 
lata laterali flavis, angulis posticis paullo productis ; elytris flavis, sutura (pone scutellum latius) maculisque 
utrinque lateralibus versus basin nigris; corpore subtus, prosterno, metasterno lateribus ventreque apice 
nigris ; pedibus piceis, tibiis femoribusque basi fulvis. 
Long. 7 lin. 9. 
Hab. Costa Rica (Rogers). 
One example only, of the same sex as the specimen above mentioned of O. belti. Of 
slender form even for this genus, the thorax especially being very narrow and gradually 
tapering towards the head, strongly bisinuated at the base, with the posterior angles 
only moderately projecting. The antenne are nearly of the same form and colour as 
in O. picticornis 2; the fulvous-yellow colour, however, is more developed, extending 
from the tip of the fifth to the base of the tenth joints. The elytra are sparsely punc- 
tulated, very obliquely truncated at the apex, narrow between the shoulders, and 
gradually tapering behind; they are yellow, with the suture narrowly dusky, the dark 
colour expanding for a short space behind the scutellum; the other black spots are 
entirely marginal and near the base, the spots nearest the base being two in number, 
elongated, and side by side; a third spot lies a little before the middle of the elytra; 
the edge of the elytral epipleure also has a dusky line. 
4, Ophistomis rufiventris. (Tab. IV. fig. 19.) 
Ophistomis rufiventris, Bates, Trans. Ent. Soc. 1872, p. 188. 
Hab. Nicaraava, Chontales (Belt).—SourH AMERICA, Venezuela. 
5. Ophistomis levicollis. 
Minus elongata, nigra, breviter setosa; thorace antice valde depresso, deinde postice convexo, impunctato, 
nitido, vittis tribus discoidalibus sanguineis ; capite angusto, fronte levi, epistomate grosse sparsim punc- 
tato, vertice crebre punctato ; elytris elongato-trigonis, humeris latis, rectis, dorso planato, crebre punctato ; 
corpore subtus, pedibus et antennis nigris, his ( 2 ) longitudine corpori eequalibus, versus apicem sensim 
incrassatis. 
Long. 53 lin. 9. 
Hab. Guaremata, Capetillo (Champion). 
Allied to C. rostrata (Bates) of Colombia, having the same remarkable form of 
the thorax, the dorsal surface of which rises abruptly from the anterior transverse 
