514 Mr. D. Sharp and Mr. F. Muir on the CompaTative 



Family PHALACRIDAE. 



Forms examined : Phalacrus grossus Er., Spain, Zito- 

 lihrus ohesus Sharp, Panama. Olihrus corticalis Panz., 

 England. 



Figs. 83 and 84 PI. LVI are Phalacridae. 



Phalacrus grossus (PI. LXI figs. 83, 83a). 



Median lobe broad and flattened ; median orifice on dorsal face 

 at apex ; median foramen large. Tegmen forming a ring- piece. 

 The " cap-piece " formed of the two flattened lateral lobes consoli- 

 dated on the dorsal side to near their apices, and a large flat 

 plate, turned down along the lateral edges, the basal corners 

 meeting together on the ventral side of the median lobe, where 

 the ring is asymmetrical. Internal sac large and complex. 

 There is a pair of long tubular glands which open on the apex 

 of the sac, one on each side of the opening of the ejaculatory duct. 

 As our specimens were dried we could not examine the testes to see 

 if these glands were extra, or if there were the usual ones having 

 an abnormal opening. In Olihrus corticalis these glands are not 

 present in this position. 



LitolibriLS ohesus (PI. LVI fig. 84). 



Median lobe broad and flattened, slightly bent near the base 

 where a flange («) runs along the dorsal face ; median orifice on 

 dorsal aspect at tip ; median foramen large, on ventral side of 

 base. Tegmen forming ring-piece. Lateral lobes small, consoli- 

 dated" together and forming a pointed, flattened plate bearing a 

 pair of small curved hooks ; basal-piece long and narrow on dorsal 

 side, broadened at the base where it encircles the median lobe, 

 having two deep emarginations causing the median central portion 

 [h) to project as a tongue. Internal sac large, bearing a pair of 

 doiible claws and a pair of small plates, as armature. 



Family MONOTOMIDAE. 



Form examined : Monotonia conicicollis Guer., England. 

 Fig. 85 PI. LVI. 



Monotonia conicicollis (PI. LVI figs. 85, 85a). 



Median lobe short, broad, flattened, and slightly curved ; 

 median orifice at tip, the dorsal edge projecting beyond the ventral 

 and pointed ; median foramen at base and of large size. From the 

 ventral edge of the median foramen proceed two long struts {ms). 



