268 H. STEMPFFER 



genera the dorsal elements are also asymmetrical and subject to individual variations 

 especially in Omipholidotos. In Telipna and Ornipholidotos we note also the presence 

 of paired organs articulated to the tergal-sternal suture, these being symmetrical in 

 Telipna, asymmetrical in Ornipholidotos. In the females of Pentila and Orni- 

 pholidotos the ostium bursae is situated laterally in relation to the ostium oviductus 

 and I suspect that the same holds good for Liptenara, but I have not had the oppor- 

 tunity to examine females of this genus. As a complementary character we note a 

 certain similarity in the wing venation of the five genera : the fore wing has 12 

 veins, there is a short precostal vein in the hind wing and veins 3 and 4 are widely 

 separated at their origins. In Pentila, Ornipholidotos and Liptenara the cell is much 

 elongated and extends beyond the middle of the wing. This combination of 

 characters seems to me to justify the grouping of these five genera into a subfamily, 

 the Pentilinae. Such a subfamily would correspond broadly to the tribe Pentilini 

 sensu Aurivillius. But this author, taking the presence of a precostal vein in the hind 

 wing as the sole criterion, included in his tribe the genera Cooksonia Druce and 

 Durbania Trimen, two genera which do not show in their male genitalia any of the 

 distinctive characters enumerated above. A precostal vein being also found in 

 Megalopalpus, a genus evidently far removed from the Pentilinae, I cannot accept its 

 presence as a character of basic importance. 



In another group of genera it is the tergal elements that have undergone important 

 modifications : the tegumen is radically reduced ; the uncus is composed of two 

 large hemispherical lobes, clearly asymmetrical, fused directly to the vinculum and 

 each armed at the apex with a long, curved, sharp-pointed process ; the valves are 

 elongate, simple in outline and apically slightly falcate ; the penis is strongly curved 

 and ends in a sharp point, its base closely wrapped in a kind of sheath borne on a 

 pedicel attached to the base of the valves. This type of genitalia is very constant in 

 the group, especially as regards the shape and asymmetry of the uncus, the valves 

 differing only slightly from one species to another. I propose to erect for these two 

 genera, Mimacraea and Mimeresia, the subfamily Mimacraeinae, (subfam. n.) 

 although they differ in venational detail and, more particularly, in size and wing 

 markings. Mimacraea more or less resembles Bematistes ; Mimeresia resembles 

 P sender esia with which it has long been confused. 



Let us now consider the genera included by Aurivillius in his tribe Liptenini. We 

 have taken out of this tribe Euliphyra, and Aslauga and Paraslauga, which we have 

 put into the Liphyrinae, and Mimacraea, which we have put into the Mimacraeinae. 

 On the other hand we have added Cooksonia and Durbania, withdrawn from the 

 Pentilinae, in spite of the presence of a small precostal vein in the hind wing, because 

 their very ordinary male genitalia in no way resemble those of the highly specialized 

 Pentilinae. On comparing the male genitalia of the species of those genera of the 

 Liptenini which I have examined, I found such a great variety of structure that I was 

 able to find only one character common to them all, namely that the base of the penis 

 is wrapped in a sheath borne on a more or less distinct pedicel attached to the base of 

 the valves, an arrangement similar to that found in the Mimacraeinae. No doubt, 

 there are other characters common to most of the genera, but no other common to 



