1869.] " 287 
NOTES ON CICINDELID^ FROM TROPICAL AMERICA, WITH DESCRIP- 
TIONS OF FOUR NEW SPECIES (GEN. ODONTOCHEILA AND 
PSEUDOX TCEEILA) . 
BY H. "W. BATES, T.Z.S., PEES. ENT, SOC. 
The Cicindelidee of the wooded plains of Equatorial America 
belong chiefly to the genera Odontocheila, Tetracha, and Ctenostoma ; 
the true Cicindelce being there few in number, and not remarkable for 
size or beauty. This accords with the local conditions of the country, 
viz., wide plains, uniformly covered with lofty forest and traversed by 
immense rivers fringed with sandy beaches. The Otenostomcd are 
exclusively arboreal insects, searching for prey along the slender 
branches of trees ; the Odontocheila are shade-lovers, running along 
the pathways of the forest and occasionally flying to the bushes on 
either side ; the TetracTice live on sandy shores, burrowing deep in the 
light soil, and coming forth only at night. The Cicindelce proper are 
creatures of the sunshine, and abound in species and individuals only 
in warm countries, where there is a varied surface, not too much over- 
shadowed with forest. It is on the sandy beaches of rivers that the 
few members of the genus Gicindela inhabiting the Amazons region are 
found ; these tracts occupy a large portion of the surface of the country, 
at least in the dry season, but the uniformity of the conditions they 
ofier is not favourable to the multiplication of forms. Of Gicindela 
only 7 species are found in the Amazon region ; of Tetraclia, 16 ; of 
Ctenostoma, 12 ; and of Odontocheila, 21 ; two Iresice and one Aniara 
complete the fauna in this department. 
The Odontocheila are distinguished structurally from Cicindela only 
by the advanced and strongly-toothed labrum and the grooved tarsal 
joints ; but their general appearance, or facies, is very difierent ; they 
are of elongate, cylindrical form, generally roughly sculptured and of 
dark bronzed hues. Some of the most beautiful (as O. Batesii) are 
found only on the margins of brooks in the deep forest, and are rare 
and local ; others swarm in incredible numbers, like house-flies in 
Autumn, in dry paths near villages. The species change in a singular 
manner from district to district ; . closely-allied but constant forms 
representing each other in dift'erent areas. 
The following descriptions comprise a few Odontocheila from the 
Amazons which have not hitherto been published, and I have added 
some synonymical notes. 
Odontocheila eubefacta, n. sp. O. cayennensi (F.) simillima, 
difert autem antennarum articulis quatuor hasaUbus pedibiisque riifis. 
Cylindrica, capite thoraceque supra creberrime subtiliter punctato-rugosis, 
