584 GEOLOGICAL SURVEY OF THE TERRITOEIES. 



EXPLANATION OF PLATE XXXV. 



Fig. 1. Apus lucasanus Pack., raised from mud from Kansas. Larva about 7"™ long. 



Fig. 2. 1st antenna of larva 5™™ long, 



Fig. 3. 2d antenna of Eulimnadia texana Pack. 



Fig. 4. Mandible (left) of Apus lucasanus Pack. 



Fig. 4a, Mandibular palpus of Eulimnadia texana Pack. 



Fig. 4h. The last smallest tootb on the cutting edge of the mandible, enlarged. 



Fig. 5. Apus lucaaarMs; 1st maxilla of larva 5^^ in length, with the maxiflary lobes 



and the spinose portion. 

 Fig. 6. 2d maxilla of Fig. 5, drawn to the same scale. 

 Fig. 7. Apiis lucasanus; Ist leg of male larva when 5™™ in length, en^-en^, emdites 1-6. 



ax'— ax*, pseudo-joints of the axis of the limb ; en^, the gnathobase. 

 Fig. 8. Apus lucasanus; End of abdomen of larva 3-5"™ lo^g- 

 Fig. 9. A2ms lucasanus; End of abdomen of larva 1™™ in len^h. ree, rectum; m, 



sphincter muscles of anus ; a', chitinous rod. 

 Fig. 10. Apus lucasanus; Lower margin of shield of ^ 5™™ in length ;*Zot, lateral line 



becoming gradually obliterated ; ip, inner posterior line. 

 N'»ie, — All the figures on tms plate were drawn by C. F. GiBsler, Ph. D. 



