118 James A. G. Rehn: On öome African Mantidae and Phasmidae 



As suggested by Werner*) there appears to be no doubt that 

 Sjöstedt's Theopompa angusticollis equals this speeies. 



Arcobotrinae. 

 Sibylla Stäl. 

 Sibylla pannulata Karsch. 



1894. Sibylla pannulata Karsch, Berlin. Ent. Zeitschr., 

 XXXIX, p. 277. [Victoria and Buea Mountains, Cameroon.] 

 Cameroon. (Conradt.) One male. 



This specimen is slightly larger than the original measurements 

 of the type. 



Sibylla graciosa n. sp. 



Type: c^; Cameroon. (Conradt.) [German Entom, Museum.] 

 Tliis specimen has been compared with the above male of 

 pannulata and a Natal male of pretiosa Stal, as well as the de- 

 scriptions of the other speeies of the genus. It is closer to pretiosa 

 than to pannulata, but from this it differs in the narrower lobes 

 on the median and caudal femora, the more produced and apically 

 bifurcate cephalic process, the longer cephalic limbs and more 

 elongate tegmina, which latter has also fewer rami to the veins. 

 In the character of the femoral lobes this speeies shows affinity 

 to 8. elegans Bolivar**), but the new form can be readily distin- 

 guished from the latter speeies by the proximal lobe on the dorsal 

 margin of the cephalic femora, the more decidedly elongate pro- 

 notum of which the shaft is strongly compressed, the shorter 

 genicular spines and non-spiniform lateral angles of the abdominal 

 Segments. Other characters of dissimilarity between graciosa and 

 elegans exist, but we have only given such as the two sexes of 

 pretiosa would lead us to believe were found in both sexes, Bolivar's 

 speeies having been founded on the female. 



Size medium; form slender. Head with the greatest width 

 very considerably exceeding the depth of head proper; occipital 

 margin with low subconical juxta-ocular lobes 

 separated from the arcuate median section of the 

 margin by shallow emarginations, the latter continued 

 ventrad one portion of the face as deeply channeled 

 impressions; ocelli fairly large, placed in a low inverted 

 triangle, dorsad of the ocelli involving the base of 

 the frontal process is placed an inverted and V-shaped sibyiia sracios» 



j T £ J.1 • X 1 • ü n. sp. Form of 



carma extendmg irom the mternal margm oi one eye ceptiaiic pro- 

 to the same of the other; facial shield transverse, *^®^^ (x'e)*^^^ 

 arcuate dorsad, subtruncate ventrad ; clypeus produced 

 dorsad into a prominent triangulär decurved dentiform process; 

 frontal process about two-thirds as long as the head is deep, the 



*) Bericht Senckenb. Naturf. Gesell., 1908, p. 41. 

 **) Mem. R. Soc. Espan. Hist. Nat., I, mem. 26, p 464, pl. XII, Fig. 1. 

 [Cameroon.] 



