Revision of Neotropical aphrophorine spittlebugs, part 1: Ptyelini (Hemiptera, Cercopoidea) Author Hamilton, Andrew text Zootaxa 2012 3497 41 59 journal article 10.5281/zenodo.282460 15d39ae0-4f0a-4ecc-83ab-2f99ae496d37 1175-5326 282460 9F22E784-360E-4DEB-A306-868F014D5F4F Cephisus jacobii Lallemand ( Fig 14 B) Cephisus jacobii Lallemand, 1912 : 39 . Type locality. French Guiana . Diagnosis. The darkest species in the genus, chocolate brown, darker ventrally, unmarked or with a few indefinite pale maculations on tegmina, and with uniquely serrated thecal processes. Head 0.75x as wide as pronotum (lateral margins of pronotum thus much longer than 3/4 length of eye); robust; crown steeply sloping, about 45o to plane of scutellum, coplanar with front part of pronotum. Male genitalia as in C. diminutus , but lateral processes of theca directed outwards, ventral processes intricately serrate ( Fig. 14 B). Length: male 12.6 mm , female 15.2 [ type ]– 18.5 mm . Width across head: female 4.5 mm ; across pronotum: female 6.0 mm. Type . Lectotype female of jacobii , here designated: Cayenne [ FRENCH GUIANA ]; in BMNH . Additional material. PERU : 1 male , Rio Tapiche 6,154' [ 3000 m ASL], 26 July 1923 (H. Bassler) Acc. 33591; in AMNH . BRITISH GUIANA [ GUYANA ] : 1 female , New River 750' [ 150 m ASL], 26 Mar.–2 April 1938 (C.A. Hudson); in BMNH . Distribution. Rare; localities in northern South America are from the Caribbean coast and the upper reaches of the Amazon Basin in Peru . Remarks. This species has the same blunt and minutely serrate tips of the lateral theca processes as C. diminutus and is probably its sister-species. It is darker and more robust, with a steeper slope to the crown. The coarsely serrate margin of each ventral theca process is peculiar to this species.