1900.] 



INSECTS AND ARACHNIDS FROM SOMALILAND. 



63 



Last abdominal sternite and lower side of 1st and 

 2nd caudal segments, and usually also of 3rd, 

 smooth ; caudal segments 1-3 keeled below. 



i 6 . Lower surface of 4th caudal segment coarsely but 

 sparsely granular, the median keels obsolete, the 

 lateral keels strongly denticulate ; superior and 

 superior-lateral crests of tail smooth ; protarsal 

 segment of 1st and 2nd legs with a single external 

 apical spine pugilator, 



b b . Lower surface of 4th caudal segment not uniformly 

 and coarsely granular, furnished with four normal, 

 subequally strong keels ; superior and superior- 

 lateral crests of tail denticulated ; protarsi of 1st 

 and 2nd legs with at least two external spines militaris. 



EXPLANATION OF THE PLATES. 



Plate I. 



Lepidoptera, Coleoptera, &c, from Somaliland. 



Fig. 1. Pseudophia oppia, p. 18. 



2. Chilena sabrina, p. 20. 



3. Ceroccda munda, p. 19. 



4. Acrcea mirabilis, p. 11. 



5. Belenois peeli, <$ , p. 15. 



6. „ ,, $,p. 15. 



7. Pseudophia lineata, p. 19. 



8. Pangonia tricolor, p. 7. 



Fig. 9. Genecerus nebulosus, p. 26. 



10. Psiloptera somalica, p. 25. 



11. Agrypnus longicornis, p. 26. 



12. Sepidium magnum, p. 29. 



13. Rhytidonota, robusta, p. 28. 



14. Sepidium bilobatum, p. 30. 



15. Julodis laticollis, p. 25. 



16. Trox expansus, p. 22. 



Fig 



Fig. 



Plate II. 

 Orthoptera from Somaliland. 



1. Rhegmatopoda peeli, p. 44. Left elytron, r?, 



2. Otiaphysa angustipennis, p. 43. Left elytron. 2 • 



3. Sauracris lacerta, t$ , p. 41. 



4. Charieis peeli, 2 , p. 37. (Antennas and apex of abdomen missing.) 



5. Milititsa somaliensis, p. 43. Right elytron. 2 • 



6. Bitrria longixipha, j , p- 38- 



7. Milititsa somaliensis, p. 43. Head and pronotum. 



Plate III. 

 Ticks from Somaliland. 

 1. Rhipicephalus marmoreus, p. 50. rf . Dorsal view. 



la. 



lb. 

 \c. 

 Id. 



Xll times linear. 

 Ventral view. 

 Capitulum and mouth-parts from below. 

 CoxEe of 1st and 2nd legs. 

 Stigma, adanal plate, and anus of left side. 



2. Rhipicephalus armatus, p. 50. tf • Dorsal view, xll times linear. 



2 a. ,, „ Ventral ^iew. 



2 b. „ ,, Capitulum and mouth -parts from below. 



2 c. „ ,, Coxa and trochanter of 1st leg. 

 2d. „ „ Adanal plate of right side. 



2e. „ „ Lateral view of posterior end of abdomen show- 



ing adanal plate, spike above it, and stigma. 

 2/. „ ,, $. Dorsal view. 



Plate IV. 



Scorpions from Somaliland. 

 Fig. 1 . Pandinus pugilator, p. 52. Nat. size. 

 1 a. „ ,, Underside of tail. 



2. Pandinus peeli, p. 53. Underside of tail. 



3. Buthus ca'lviceps, p. 54. Carapace. 



3 a. „ „ Underside of 3rd, 4th, and 5th caudal segments. 

 3 b. „ ,, Chela. 



