Ellipsoptera hirtilabris
(LeConte, 1875)
Moustached Tiger Beetle
Ellipsoptera hirtilabris, commonly known as the moustached tiger beetle, is a Florida- flashy tiger beetle in the . The is distinguished by dense prostrate hairs covering its , the feature that gives it both its and specific epithet (from Latin hirtum "hairy" + labrum "lip"). exhibit striking white coloration with extensive white maculations covering nearly the entire elytral surface, combined with dense white on the , , underside, and legs. This coloration provides effective camouflage against the white sand where it occurs. The species is closely related to E. gratiosa, with which it shares similar appearance but does not overlap in range.
Pronunciation
How to pronounce Ellipsoptera hirtilabris: /ɛ.lɪpˈsɒp.tərə ˌhɜːr.tɪˈlæ.brɪs/
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Identification
The dense covering of prostrate hairs on the distinguishes E. hirtilabris from its closest relative E. gratiosa (Whitish Tiger ), which lacks this feature. The two are : E. hirtilabris occurs in peninsular Florida while E. gratiosa occupies coastal pine barrens from Virginia through the Carolinas, southern Georgia, and the Florida panhandle. E. hirtilabris shows slightly less expanded white markings with more diffuse edges where they meet the central bronze area, and is slightly smaller in size than E. gratiosa. The combination of white coloration, small bronze elytral patches, and peninsular Florida location supports identification.
Appearance
display extensive white coloration with striking white maculations covering almost the entire elytral surface. Dense white covers the , , underside, and legs. Small bronze-colored patches remain along the elytral . The bears a dense covering of prostrate hairs—the diagnostic "moustache" trait. Markings are slightly less expanded with more diffuse edges where they contact the central bronze area compared to the closely related E. gratiosa. Overall size is slightly smaller than E. gratiosa.
Habitat
Pine woodlands, sand hills, and other with open white sand. Specifically associated with dry sand scrubland on the Lake Wales Ridge in central Florida. Requires sandy substrates that match the 's cryptic white coloration.
Distribution
Primarily peninsular Florida, considered a Florida . Range extends just outside Florida to extreme southeastern Georgia on St. Simon's Island. Does not overlap with the range of E. gratiosa.
Seasonality
active in early August based on field observations; likely summer-active. Specific period details are limited.
Behavior
freeze in position when approached, making them difficult to detect. Once detected, individuals are extremely wary and difficult to approach closely. The white coloration with small brown markings provides effective camouflage against white sand substrates; the bronze elytral patches may further enhance by resembling small debris. Adults blend into white sand and are nearly impossible to see until they move.
Similar Taxa
- Ellipsoptera gratiosaSimilar striking white maculations and dense white , but lacks the dense prostrate hairs on the ; occurs in coastal pine barrens from Virginia to Florida panhandle ( distribution); slightly larger with more expanded markings and less diffuse edges where white meets bronze areas
- Cicindela highlandensisShares white sand scrubland on Lake Wales Ridge in central Florida; resembles debris rather than blending into sand; occurs syntopically but distinguished by different color pattern and
More Details
Etymology
The specific epithet hirtilabris derives from Latin hirtum meaning "hairy" and meaning "lip", referring to the diagnostic dense prostrate hairs on the labrum.
Evolutionary history
E. hirtilabris and E. gratiosa likely evolved from a common ancestor, diverging in isolation during the pre-Pleistocene separation of peninsular Florida from the North American mainland. This vicariance event explains their current distributions and morphological similarities.