366 
INSECTA. 
Megacephala, Lat. 
Labrum very short and transversal ; first joint of the labial palpi 
much longer than the second, and projecting beyond the men- 
tum *. 
OxYCHEILA, Dej. 
The labrum forming an elongated triangle, first joint of the labial 
palpi not much longer than the second, and not extending bej'ond 
the emargination of the mentum f. 
In the following species the labial palpi are at most about the 
length of the external maxillary palpi, the last joint is longer than 
the penultimate. They also form two subgenera. 
Euprosopus, Lat. Dej. 
The third joint of the labial paljn thicker than the last ; the three 
first joints of the anterior tarsi of the males somewhat elongated, 
flattened, carinated beneath, and equally ciliated on both sides ; very 
large eyes. They keep on trees J. 
CiCINDELA, Lat. 
The true Cicindelae only differ from the Euprosopi in the third 
joint of the labial palpi, which is not much thicker than the fourth ; 
and in their anterior tarsi, whose three first joints, in the males, are 
much elongated, more strongly ciliated on the internal side than the 
external, and are destitute of a carina beneath. 
Their body is usually of a darker or lighter green, mixed Avith 
various brilliant metallic tints ; the elytra are marked with white 
spots. They prefer dry, Avarm situations, run Avith considerable 
SAviftness, take Aving the moment they are approached, but alight at 
a short distance. If pursued, they have recourse to the same means of 
escape. 
The larvse of the tAvo species indigenous to France, the only ones 
that have been observed, excavate in the earth a deep cylindrical 
hole, an operation Avhich they effect Avith their mandibles and feet. 
To empty it, they place the detached particles on their head, turn 
about, climb ujs the ascent little by little, resting at intervals, and 
clinging to the Avails of their domicile by means of their tAvo dorsal 
mammillae ; when they arrive at the mouth of the aperture they throAV 
doAAm their burden. While in ambuscade, the plate of their head 
exactly closes the entrance of their cell, and is on a level Avith the 
ground. They seize their prey Avith their mandibles, and even dart 
* Cicindela 7negalocepliala, Fab. ; Oliv., II, 33, 11,12; C. Carolina, Oliv. Ib., xi, 
2 ; — Megacephala euphrutica, Hist. Nat. des Coleop. d’Eur., I, 1,2. For the other 
species, see Dejean, Species des Coleoptferes, I, p. 6, et seq. In the United States, 
Meg. Carolina and Meg. virginica, both beautiful species. 
t Cicindela tristis, Fab. ; Oliv., Coleopt., II, 33, iii, 35 ; Oxi/cheila fristis, Dej., 
Species Gener. des Coleop. I, p. 16 ; — Cicindela bipustidaf a, Lat. ; Voy- de Humb. et 
Bonpl. ; Obser. d’Anat. et de Zool., No. XIII, xvi, 1, 2. 
X Cicindela ^-nofata, Hist. Nat. des Coleop. d’Earop., I, i, 0 ; Euprosophus 4-«o- 
Mus, Dej., Spec. Geuer. des Coleopt. I, p. 151, 
