B\^ ELAND SHAW. 



225 



tlie north; and it is interesting to note that while bicolor Kirby, the most northerly 

 o£ the group still possesses vestigial tegmina, and scaibrella Tepper the most 

 southerly, has no trace of tegmina at all, the two species intermediate in latitude, 



Text-iig. 1. Plaiyzosieria analis Sauss. Portion of left posterior leg, ventral 

 aspect, (a) Coxal ridge; (b) Coxal groove; (c) Coxal border; (d) 

 Coxal process; (e) Trochanter; (f) Femur; (g) Tibia. 



Text-fig. 2. Plaiyzosteria spaiiosa Shaw. ?. Apex of abdomen, dorsal aspect. 

 (Paratype. No. 124, Coll. Shaw). 



Text-fig. 3. Cutiiia illingworthi Shaw. 5- Right tegminal vestige. (Paratvpe. 

 No. 142, Coll. Shaw). 



Text-fig. 4. Cutiiia illingworthi Shaw. S- Subgenital lamina. (Tvpe. No. 136, 

 Coll. Shaw). 



Text-fig. 5. Cutiiia spryi Shaw. c?. Apex of abdomen, ventral aspect. (Para- 

 type. No. 243, Coll. Shawl. 



Text-fig. 6. Cutiiia Jeriarum Shaw. $. Apex of abdomen, dorsal aspect. (Para- 

 type. No. 253, Coll. Shaw). 



Text-fig. 7. Zonioploca dixoni Shaw. c?. Apex of abdomen, dorsal aspect. (Type. 

 No. 232, Coll. Shaw) . 



in the course of their progTess towards the loss of all trace of flying organs, 

 show shallow grooves indicating the position of the lost tegmina, the more 

 northerly of the two species having these grooves the better marked. 



