180 



ward .regularly to the median ridge, the posterior lobe with the disk flat; an- 

 terior margin truncate, posterior margin prolonged, a little less than a right- 

 angle, but obtusely rounded at the tip ; posterior lateral margins much sloped, 

 "very slightly curving inward, but not angulate. Elytra ovate-lanceolate with 

 two very strong longitudinal nerves dividing them into three sub-equal fields ; 

 nervules prominent and reticulate; extend about two-thirds the length of the 

 abdomen. Posterior femora quite thick near the base, shorter than the ab- 

 domen; tibiae enlarged at the apex; first joint of the tarsi very long, second 

 very short. 



Color. — Yellow and black. Head is bright-yellow, except as follows: 

 eyes black ; two stripes on the occiput reaching as far forward as the eyes, a 

 semicircular dotted stripe behind each eye, the margins of the vertex, and 

 inside of the antennal foveoLe, black. Palpi, base of the mandibles and 

 lateral margins of the clypeus, frosty-white. Pronotum yellow-olive, with an 

 interrupted black stripe along the lateral carinse and a black stripe along the 

 middle, which is divided into two parts or stripes by the olive-colored median 

 carina. Elytra dull olive-yellow on the prominent reticulate nervules; the 

 two longitudinal nerves and cellular spaces black ; the middle field is tinged 

 with red. Wings with the base and disk a bright crimson-red, with the outer 

 margin black. Abdomen bright-yellow, each segmeut with a large, black 

 spot on each side; these are' less on the basal than the apical segments. 

 Ventei* and sternum almost entirely pale-yellow. Posterior femora dull 

 orange-yellow, marked with black, as follows : A narrow stripe each side of 

 the upper carina, alternate rays or pinnae of the disk, with corresponding 

 marks on the inner face, black. Tibise bright-yellow, inferior and external 

 face marked with a narrow black stripe at the apex. Tarsi yellow above ; 

 joints, claws, and pulvilli black. Antennae yellow, striped with black on the 

 under side. 



R. .marci, Serv., Hist. Orthop., 623. 



Syn., AcrUUum {Romalca) giganteum, De Haan, Bijdr. Keim. Orthop., 143. 

 Khomulea gigantca, Burm., Handb. Ent., II, C19. 

 Dictyophorus rcticulatus, Thuub., Mem. Acad. St. Petersb., V, 259. 



Female. — Body black, varied with yelloiv. Face olive; labrum tipped 

 with black ; clypeus fuscous ; lateral carinse yellow. Occiput and vertex 

 black, a yellow line reaching from the vertex to the pronotum ; a yellow spot 



