AN ATTEMPT TO REVISE THE FAMILY (( LIXGUATULIDAE )) 



59 



« Corpus elongatum, cylindricum, in adultis feminis transverse 

 costatum. Céphalothorax clavatus, fronte rotundatus. Abdomen 

 27-30 annulis compositum, qui ad ultimum usque limbo praestant 

 amplo, calloso, formam costatam supra memoratam efficiente. 

 Stigmata dense collocata in tota fere superficie annulorum inve- 

 niuntur, 8-11 séries retrorsum sensim dimi- 

 nuentes lormantia. Fulcrum latum, bre- 

 viusculum, postice truncatum. Longitudo 

 feminae usque ad 94 mm,, latitudo 4,5 mm. 

 Exemplaria minora, quorum longitudo est 

 15-25 mm. et latitudo 1,8-2,3 mm. limbos 

 habent annulorum vix prominentes corpus- 

 que fere integrum, annulatopîicatum. Mino- 

 ribus his feminis congruit mas et forma et 

 magnitudine. » — Leuckart. 



Habitat. — In the lungs of the Egyptian 

 Cobra {Naja haje). 



The larval form, according to Lohrmann, 

 lives encapsuled in the « Purpurhuhn » 

 {Porpkyrio sp.). Some spécimens with 26 

 rings notcounting the tail, taken from the Numidian Crâne ((7r/<.s 

 virgo) exist in the Musée d'Histoire naturelle, Paris. 



In a spécimen of this species in the Cambridge Muséum the rings, 

 which are very distinct, number 26, v^ithout the terminal joint. The 

 head is not ringed, and is attached to the body by a very narrow 

 neck. The mouth is very small, almost round. The 5th and 6th 

 rings are fused w^ith one another laterally, but this is probably 

 abnormal. The posterior end is indented. The lengtli is 80 iiim. 



Fig. 5. — Porocephalus 

 annulatus Baircl X 4- 



2. — Porocephalus aonycis Macalister (1). 



Synonym. — Pentastoma aonycis Macalister. 



Diagnosis. — « Thèse parasites measured 17-20 mm. in length, 

 and were straight, elongated,acuminated, with nearly conical apex 

 and an obtusely truncated head which is 25 mm. in width. It is 

 closely annulated with 30 rings, each of which is sharply defined 



(1) Proceedings of the R. Irish Acad., (2), II, Science, p. 66, 1873-77. 



