2 CARCiNOLOGtCAL STUDIES. 



Actaea rugata, A. Milne Edwards, in: Nouv. Archives du Muséum , 

 T. [, p. 269. 



Aclaea rufopunctala , de Man, in: Journal Linnean Society of Lon- 

 don , Vol. XXII, 1887, p. 20, and in: Arcliiv fur Naturgeschichte , 

 Bd. 53, 1888, p. 261. 



One female specimen without eggs, from Samoa, pur- 

 chased from the Museum Godeffroy. 



This species is closely allied to Actaea rufopunetata M. E., 

 so that oue easily may confound them. I now studied in 

 Paris adult type-specimens of the two species, and I observed 

 the following differences. 



The cephalothorax of A. rufopunetata is a little more 

 enlarged and the distance between the external orbital angles 

 (and therefore also the breadth of the front) is compara- 

 tively somewhat smaller in this species than in A. rugata. 

 The upper surface of the cephalothorax of A. rufopunetata 

 is covered with a very short close down, similar to that 

 of Actaeodes tomentosus M. E. ; the interregional grooves, as 

 well as -the lobules themselves , are clothed with it , excepted 

 the granules with which the lobules are covered. In A. 

 rugata , however , the lobules of the upper surface of the 

 cephalothorax and the legs are clothed, besides with a 

 close down , with tolerably long stiff yellowish brown hairs , 

 which are inserted between the granules. 



As regards the form of the front , the two species agree 

 with one another. In both species the regions 2 M are 

 by longitudinal grooves divided into four protogastric 

 lobules; in A. rufopunetata these lobules are nearly of 

 the same size, but in A. rugata the external proto- 

 gastric lobules are about twice as broad as the 

 internal ones. The cardiac region of A. rufopunetata shows 

 anteriorly a trace of a median longitudinal furrow , whereas 

 in A. rugata this lobule appears always quite undivided. 



The legs , finally , present a different appearance in both 

 species. The carpopodites and propodites of A. rufopunetata 

 are, namely, very nodose and these tubercles are 

 especially characteristic to the ambulatory legs. In A. rugata 



Notes from ttie Leyden IMuseum, "Vol. XIII. 



