. The Entomologist's record and journal of variation. hyl parahydroxybenzoate: This is added in the formof a 15% solution in Ethyl alcohol also used with the vitamins,a substance which is very expensive indeed. Since the rearingof larvae is a legitimate scientific pursuit, application shouldbe made to Customs and Excise for a permit to buyduty-free alcohol. It is also possible that the ready-madesolution may be bought free of duty. Enquiries should be madebeforehand. Formaldehyde: This is used at a strength of 10%. Agar: This should be added to cold water and heated in adouble saucepan or
. The Entomologist's record and journal of variation. hyl parahydroxybenzoate: This is added in the formof a 15% solution in Ethyl alcohol also used with the vitamins,a substance which is very expensive indeed. Since the rearingof larvae is a legitimate scientific pursuit, application shouldbe made to Customs and Excise for a permit to buyduty-free alcohol. It is also possible that the ready-madesolution may be bought free of duty. Enquiries should be madebeforehand. Formaldehyde: This is used at a strength of 10%. Agar: This should be added to cold water and heated in adouble saucepan or suitable waterbath, otherwise it will use of Gelatine and Sodium alginate in place of agarrequires investigation. TABLE II The composition of the vitamin additive for the artificialdiets. Ethyl alcohol 50 ml. Water 50 ml. Nicotinic acid 600 mg. Calcium pantothenate 600 mg. Ribofiavine 300 mg. Aneurine hydrochloride 150 mg. Pyridoxine hydrochloride 150 mg. Folic acid 150 mg. D-biotin 12 mg. Cyanocobalamine mg. {To be continued) PLATE IX. Photo: H. N. Wykeham Colotis sp. from South West Africa, $ , upperside and underside Figures times natural size. 185 Note on an Apparently New Species of Colotis Hiibner (Lepidoptera: Pieridae) from South West Africa By C. G. C. Dickson, * A single male specimen of a Colotis which does not seemto answer to any known species was captured by Mr. C. in June, 1977, when he was serving on the SouthWest African Northern Border, at the Rua Cana Falls. Thisbutterfly shows affinity in certain respects to C. agoye bowkeri(Trimen) and C. eris eris Klug, but also differs very markedlyfrom both these species. It is apparently more closely relatedto eris. The male genitalia have been dissected and severaldifferences have been found in comparison with those of theother two species — in, for instance, the uncus, valves andaedeagi. The genitalia are closer to those of eris. In theopinion of Dr. C. B. Cottrell, to whom the dissec
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