104 GEO. H. HORN, M. D. 



EXPLANATION OF PLATE V. 



Fig. 1. Leptinillus validus 9 Horn, much enlarged. 

 " 2. Under side of same. 



" 3. Lateral view of head and thorax showing the eye-spot at e. 

 " 4. Maxilla of Leptinillus. 

 " 5. Mentum of same. 

 " fi. Mandibles of same. 



" 7. Platypsylla castoris Ritsema, greatly enlarged. 

 " 8. Under side of dissected head showing the labrum at a, and the partial 



outline of the mandible posterior to it. 

 " 9. Antenna of Platypsylla with the club (a) more enlarged, showing the 



apparent number of its joints. 

 " 10. Maxilla of same. 

 " 11. Mentum of same. 

 " 12. Mandible of Platypsylla as previously figured (a) with the same piece as 



figured (d), as seen by me under higher power with oblique light. This 



piece from its size appears to be one of the tubercles broken off which 



are shown in fig. 8, behind the labrum. 



O 



EXPLANATION OF PLATE VI. 



Fig. 1. Peploglyptus Belfragei Lee. 

 " 2. Head and thorax, showing the position of the antennse free and at rest. 

 " 3. Oniticellus californicus % Horn; a, antenna; 6, head of £• 

 " 4. Same, lateral view. 

 " 5. PolymcEchus brevipes ^ Lee. 

 " 6 — 7 — 8. Anterior, middle and posterior legs seen from the front or under 



side. 

 " 9. Labrum of Po/ymachi/s. 



" 10. Maxilla of same. 



" 11. Mentum of same. 



•' 12. Mandible, viewed laterally. 



" 13. Cryptostoma Dohrni Horn. 



" 14. Psephenus Lecontei Hald. 



'• 15. Under side of same. 



" 1 6. Lara avara Lee. 



" 17. Mecomycter omalinus Horn. 



" is. Myrniecotspectra Nietneri Motsch. 



" 19. Lateral view of same. A small insect (.14 inch ; 3.5 mm.), from Ceylon. 



