Belfrage’s cricket
Trigonidomimus belfragei Caudell 1912

map
female
face
hind tarsus
 
 
 
ovipositor
 
 
 

Identification:  Length 5-7 mm. A small brown cricket that looks superficially like a sword-tail cricket (Trigonidiinae) but has the antennae originating below the middle of the face. The second tarsal segments are small and cylindrical; the hind tibiae are slender and modestly spined; and the ovipositor is slender and straight.

Habitat:  Unknown; flies to light. The tarsi and ovipositor resemble those of ground dwelling species.

Season:  Aug.–Oct.

Song:  Unknown. Males of some species of anomalous crickets have female-like forewings and are mute.

Similar species:  (l) Sword-tail crickets (Trigonidiinae)—second tarsal segments pad-like; ovipositor flattened and often curved. (2) Ground crickets (Nemobiinae)—tibia robust with large spines.

Remarks:  This species is known from only four specimens, all female: two from Bosque County, Texas; one from Stillwater, Oklahoma; and one from Vera Cruz, Mexico. Because the records are so few and the habitat is unknown, the distribution of Belfrage's crickets within the United States is highly uncertain.

More information:  subfamily Pentacentrinae

References:  Caudell 1912, Hebard 1932.

Nomenclature:  OSF (Orthoptera Species File Online)