1S75.] J. Wood-Mason — On new or little-known species of Phasmidse. 217 



that of the right side heing by far the larger ; minute scale-like rudiments 

 of tegmina and wings. 



Total length, 9 in. 4>i lin. ; antennae, 1 in. 1\ lin. ; head, 7 lin. j 

 prothorax, 5| lin. ; mesothorax, 1 in. 9| lin.; metathorax, 1 in. 3i lin. 

 abdomen, 4 in. 1 lin. -f 1 in. 2| lin. = 5 in. 3| lin. ; breadth of 6th abcL 

 segment at base, 3| lin., of the same at apex, 8| lin. 



Male unknown. 



Hab. Nazeerah (Foster) and Samaguting (J. Butler), Assam. 



I have much pleasure in naming this gigantic insect after my friend 

 and former teacher Professor Westwood, Hope Professor of Zoology in 

 the University of Oxford. 



Lopaphus Iolas, Westw. 

 $ Necroscia Iolas, Westw., Monograph, of Phasinidae, p. 145, pi. xix, fig. 2. 

 ¥ . Much stouter than the male, about the same size and thickness, 

 and relative proportions as Bacteria Baucis, but with the mesothorax 

 narrowed in front ; head, and pro- and mesonotum with scattered granules ; 

 legs armed as in the male ; tegmina in the form of small closely appressed 

 overlapping scales ; not the faintest trace of wings ; terminal dorsal abdomi- 

 nal segment and operculum much as in Bacteria Baucis and Lonchocles 

 Bootanicus. 



Total length, 4 in. 6f lin. ; head, 2| lin. ; proth. 2f lin. ; mesoth., 

 13 lin. ; metath., 5| lin. ; abd., 2 in 2f lin. -f 5 = 2 in. 7f lin. ; antenn., 

 3 in. 5 lin. ; tegmina, 2 lin. 



The following are the admeasurements of a specimen of the male : 

 Total length, 3 in. 2 lin. ; head, \\ lin. ; proth., If lin. ; mesoth., 8 lin. ; 

 metath., 4 lin. ; abd., 18| + 3^ = 22 lin. ; antenn., 2 in. 9 lin. ; tegmina, 

 2f- lin. ; expanse of wings, 2 in. 11 lin., or reaching as far as to the apex of 

 the 4th abdominal segment. 



Hab. — Johore, in the Malay peninsula, and Sinkieb Island, off the 

 N. E. coast of Sumatra, where the specimens were taken by my native col- 

 lector. Professor Westwood's Necroscia Iolas was from Malacca. 



Were it not for the presence of wings in the male and of rudimentary 

 tegmina in the female, this species would have to be placed next to Loncliodes 

 porus, Westw., the female of which will, I feel confident, prove to be either 

 Loncliodes Bootanicus or Bacteria Baucis, or at any rate some closely similar 

 form. It is placed, provisionally, in the genus Lopaplius, because the nearest 

 winged ally of the female is indubitably the Lopaplius brachypterus of De 

 Haan ; but it might also have been ranged with the Bliibalosomas, the females 

 of some of which have minute scale-like rudiments of organs of flight, in the 

 shape of mere adnate processes of the dorsal integument of the meso- and 

 metathorax. 



