378 ^^6 Philippine Journal of Science isis 



of Pachyrrhynchus orhifer Waterh. from the same plant. The 

 general resemblance of Doliops imitator to the former species 

 and even greater resemblance to some of the forms of the 

 latter species are truly remarkable. Even the fine lines sur- 

 rounding the bare spots, so characteristic in P. orhifer Waterh., 

 are vi^ell pronounced in this mimetic cerambycid. 



Concerning the problems of mimicry - and the fundamental 

 reasons for it with reference to Coleoptera as applied to the 

 above species, belonging to different genera of one family or to 

 entirely different and widely separated families, the most essen- 

 tial factor for any consideration at all would be that such mi- 

 metic species are found together in the same locality or even 

 on the same plant. In this respect it is worth mentioning the 

 following species which would enter into consideration based on 

 actual observation and data: 



Pachyrrhynchus orhifer Waterh., Metapocyrtus orbiferoides Schultze, 

 and Doliops itnitator Schultze. Collected from the same plant, on Mount 

 Nagapatan, Ilocos Norte, Luzon. 



Pachyrrhynchus reticulatus Waterh., Pachyrrhynchus gloriosus Faust, 

 Metapocyrtus {Orthocyrtus) pachyrrhynchoides Heller, Metapocyrtus 

 {Orthocyrtus) bakeri Heller, and Doliops pachyrrhynchoides Heller. Col- 

 lected together in Paete and on Mount Banahao, Luzon. 



Pachyrrhynchus congestus Pasc, Metapocyi-tus congestus Schultze, and 

 Alcides schuetzei Schultze. All from the neighborhood of Baguio, Benguet, 

 Luzon. 



Pachyrrhynchus jugifer Waterh. and Metapocyrtus panayensis Schultze. 

 From the same locality and the same plant; Mount Macosolon, Capiz, 

 Panay. 



It seems premature for the present, aside from the above- 

 mentioned facts, to enter into any reasonable explanation for 

 the above mimetic forms, since much more exact data are neces- 

 sary on the subject. By the examination of large numbers of 

 birds' stomachs we hope to obtain some more information. This 

 work is being carried on in cooperation with Mr. R. C. McGregor. 



RHIPIDOCERID^ 

 NEW CALLIRHIPIS SPECIES 



Callirhipis macgTegori sp, nov. 



Male. — Brownish red. Head densely punctured, eyes rela- 

 tively large and produced. Antenna red, first joint rather long. 

 Prothorax densely punctured, at the middle, laterally, with a 

 large shallow depression, inside of which is located a fovea, the 



= Heller, K. M., This Journal, Sec. D (1912), 8, 299. 



