328 



APPENntX. RELOSTOMATID.^. 



Family BELOSTOMATID^. (Vol. Ill, p. 34.) 



Genus BELOSTOMA. (Vol. Ill, p. 37.) 



3104.'^Belostoma deyrollei, Vuill. An». Soc. Ent. Fr. 1864, p. 141, 

 pi. i, f. 5 ; Mayr, Verh. z.-b. Ges. Wien, xxi, pp. 423 & 425 

 (1871). 

 Var. aberrans, Mayr, torn. cit. pp. 423 & 424. 



" Clear ashy-brown, tlie wliole of the pronotum and the lateral 

 margins of the elytra sordidly testaceous : legs clear brown, 



Fig. 189. — Belostoma deyrollei, var. aberrans. 



marbled with some testaceous spots ; head between the eyes tri- 

 angular in form, sti'ongly defined and not parallel as in the other 

 Bdostomas ; pronotum in a half-circle ; nervures of the membrane 

 regularly ret'culuted." ( Vuillefroy.) 



Mayr founded his aberrans (which I here treat as a local form 

 or variety) as having the lateral margins of the pronotum in the 

 middle quite straight, in front strongly arched to the anterior 



