Matsumurasca ( Solanasca ), 1974

Key to species of Matsumurasca ( Solanasca) View in CoL known to occur in Costa Rica

1 Anterior margin of crown rounded or subparallel with posterior margin; crown midline 1.1x to 1.2x longer than wide between eyes; apex of aedeagus wide, moderately quadrate........................................................... 3

- Anterior margin of crown weakly produced; crown midline 1.3x to 1.4x longer than wide between eyes; apex of aedeagus narrow, digitate or pointed.............................................................................. 2

2 Aedeagus curved dorsad; basal process small, digitated and somewhat straight, not reaching the midlength of shaft..................................................................................... M. canavalia (DeLong, 1932) View in CoL

- Aedeagus weakly curved dorsad; basal process prominent, narrowing towards apex, and reaching the midlength of shaft........................................................................ M. dilitara (DeLong & Davidson, 1935) View in CoL

3 Dorsal margin of aedeagus well-sclerotized and differentiated; aedeagal processes shorter than atrium; gonoduct strongly wide; gonopore on posterior margin............................... M. judokuatare Arrieta-Arrieta & Pinedo-Escatel , sp. nov.

- Dorsal margin of aedeagus membranous, poorly defined; aedeagal processes longer than atrium; gonoduct moderately tubular; gonopore on dorsal margin.............................................. M. laceiba (Ross & Cunningham, 1960) View in CoL .