Sinthusa is a genus of lycaenid butterflies, the sparks. They are small species with the male genitalia and secondary sexual characters of Virachola, but less robust and weaker in flight. The males are easily recognized, with the forewings oily indigo blue changing to shining blue in a side light and hindwings shining violet blue in all lights. The species of this genus are found in the Indomalayan realm. The genus was erected by Frederic Moore in 1884.
Hypolycaena toshikoae is a butterfly of the family Lycaenidae first described by Hisakazu Hayashi in 1984. Forewing length: 10–13 mm. It is endemic to the islands of Luzon and Mindoro in the Philippines. On Mount Halcon of Mindoro island, the male is not rare but the female is very rare.
Tajuria matsutaroi is a butterfly of the family Lycaenidae first described by Hisakazu Hayashi in 1984. It is endemic to the Philippine islands of Mindanao and Leyte. Forewing length is about 16–19 mm. The butterfly is a rare species. The nominotypical subspecies is found only on Mount Apo on Mindanao island and occurs several times a year.
Hypolycaena irawana is a butterfly of the family Lycaenidae first described by Hisakazu Hayashi, Heinz G. Schroeder and Colin G. Treadaway in 1984. It is found in Palawan in the Philippines.
Dacalana mio is a butterfly of the family Lycaenidae first described by Hisakazu Hayashi, Heinz G. Schroeder and Colin G. Treadaway in 1983. Forewing length: 16–18 mm. It is rare species, endemic to the Philippines and found only on the islands of Mindanao and Leyte.
Rachana mioae is a butterfly of the family Lycaenidae first described by Hisakazu Hayashi in 1978. Eliotia mioaeH. Hayashi, 1978 was moved to Rachana, because Eliotia is the junior homonym of a genus of marine animals described in 1909.
Arhopala tomokoae is a butterfly of the family Lycaenidae. Panchala paraganesa tomokoae H. Hayashi, 1976 was moved to Arhopala paraganesa tomokoae by Schröder and Treadaway in 1955 and its status changed to Arhopala tomokoae by Schrőder and Treadaway in 2002.
Rapala tomokoae is a butterfly of the family Lycaenidae first described by Hisakazu Hayashi, Heinz G. Schroeder and Colin G. Treadaway in 1978. It is endemic to the Philippines. Its forewing length is 17–19 mm.
Dacalana kurosawai is a butterfly of the family Lycaenidae. It is endemic to the Philippines and found in Palawan and Calamian islands.
Deramas ikedai is a butterfly of the family Lycaenidae, found on Mindanao in the Philippines. The species was first described by Hisakazu Hayashi in 1978.
Sinthusa mindanensis is a butterfly of the family Lycaenidae first described by Hisakazu Hayashi, Heinz G. Schröder and Colin G. Treadaway in 1978. It is found on the Philippine islands of Mindanao and Leyte.
Catapaecilma nakamotoi is a butterfly of the family Lycaenidae first described by Hisakazu Hayashi in 1979.
Pratapa tyotaroi is a butterfly of the family Lycaenidae first described by Hisakazu Hayashi in 1981. It is endemic to the Philippines. On Mindanao island it is distributed on Mount Apo, Mount Kitanglad and Mount Masara.
Rachana circumdata is a butterfly of the family Lycaenidae first described by Heinz G. Schroeder, Colin G. Treadaway and Hisakazu Hayashi in 1978. It is found on Marinduque in the Philippines.
Dacalana akayamai is a butterfly of the family Lycaenidae first described by Hisakazu Hayashi, Heinz G. Schroeder and Colin G. Treadaway in 1983. It is endemic to the Philippine island of Mindanao.
Tajuria deudorix yuhkichii is a subspecies of the butterfly Tajuria deudorix in the family Lycaenidae. The subspecies was first described by Hisakazu Hayashi in 1984. It is found in Palawan in the Philippines.
Sinthusa stephaniae is a butterfly of the family Lycaenidae. It is found on the Philippine islands of Mindanao, Leyte, Negros and Samar. Sinthusa mindanensis stephaniae was raised to species status as Sinthusa stephaniae by Colin G. Treadaway and Heinz G. Schröder in 2012. The forewing length is 12–15 mm. The habitat of subspecies S. s. stephaniae and S. s. mindanensis overlaps on the islands of Mindanao and Leyte.
Paruparo cebuensis is a species of butterfly in the family Lycaenidae. It is found in the Philippines.
Hypothecla astyla is a butterfly in the family Lycaenidae first described by Cajetan Felder and Rudolf Felder in 1862. It is found on the Philippines.
Tajuria igolotiana is a butterfly of the family Lycaenidae first described by Siuiti Murayama and Hachiro Okamura in 1973. It is endemic to the Philippines and found on Luzon, Mindoro and Mindanao islands. The forewing length is 17–19 mm. Subspecies T. i. fumiae is distributed on Mindanao.
