1919-] ^' SiLVESTRi : Indian Chilopoda Geophiliniorpha. 47 



Chamb. ; Prolamnonyx, Silv. {Tygarrup, Chamb. forsan = Dicel- 

 lophilus, O. F. Cook.'). 



Conspectus generum. 



I. Subcoxae segment! praegenitalis (ultimi pediferi) per- 



magnae segmentum praecedente amplcctentes ... Megetlunits. 



Typus : M. micvoporiis (Haase). Luzon. 



:?. Subcoxae segment! praegenitalis ad latera segmenti 

 praecedentis liaud vergentes. 



3. Palpi maxillares ungue distincto instructi. 



5. Lamina cephalica spina antica infera sub- 



laterali instructa ... ... .. Lanuionyx. 



Typus: L, puiictifroiis {^t\\'\i.). India. 



6. Lamina eephalica spina antica infera sub- 



laterali destituta ... ... ... Dicellopliiliis. 



Typus ; D. linatus (Wood). 



4. Palpi maxillares ungue nullo. 



7. Mandibulae laminis pectinatis numerosis in- 

 structae ; maxillae primi paris subcoxis coal- 



itis ... ... ... ... Prolamnonyx. 



Typus : P. holstii, Poc. China ; Japan. 



8. Mandibulae laminis pectinatis duabus in- 

 structae ; maxillae primi paris subcoxis mediis 

 divisis ... ... ... ... Ami p. 



Typus : A. pylorus, Chamb. California. 



On the family name here used. 



Newport in 1842 described the genus M ecisiocephalus basing 

 it upon tiie following species: (i) M ecisiocephalus ferrugineus (C. 

 Koch) ; (ii) M. inaxillaris (Gerv.) ; (iii) M. punctifrons, Newp. 

 etc. Newport did not indicate the type species of the genus, but 

 O. F. Cook proposed to consider the first, viz. M ecisiocephalus 

 ferrugineus as the type, notwithstanding the fact that C. L,. Koch 

 in 1847 erected the genus Pachymerium for this species. Follow- 

 ing this rule O. F. Cook founded in 1895 the genus Lamnonyx for 

 the reception of M. punctifrons and allied forms and the genus 

 Dicellophilus for M. limatus (Wood) of California. On the basis 

 of this arrangement O. F. Cook named the family Dicellophilidae 

 from Dicellophilus. Pocock in 1898 considered M. punctifrons as 

 the type of M ecisiocephalus, after C. Koch had taken out M. ferru- 

 gineus. Attems in 1903 refused in part to follow Cook and Pocock 

 and considered, very wrongl5% the species M. carniolensis as the 

 type of the genus M ecisiocephalus. This species was unknown to 

 Newport, at any rate when he proposed the genus M ecisiocephalus. 

 Attems accepted the genus Lamnonyx with L. punctifrons as type 

 species, and he therefore named the .subfamily Mecistocephalinae. 

 Verhoeff (1908), Brolemann (1909) and Ribaut (1914) followed 

 Attems, but gave the group family rank. 



Chamberlin (1914), with Pocock in 1898, noted that M. ferru- 

 gineus having been removed from M ecisiocephalus as the type of 

 Pachimevium, C. Koch (1847), M ecisiocephalus, Newport must 

 remain with the type species M . punctifrons smd not M. carniolensis ^ 

 which was not included by Newport in the list. 



