»584 GEOLOGICAL SURVEY OF THE TERRITORIES. 
EXPLANATION OF PLATE XXXV. 
Fig. 1. Apus lucasanus Pack., raised from mud from Kansas. Larva about 7™™ long. 
Fic. 2. Ist antenna of larva 5™™ long, an: 
Fig. 3. 2d antenna of Hulimnadia texana Pack. 
Fig. 4. Mandible (left) of Apus lucasanus Pack. 
Fig. 4a. Mandibular palpus of Hulimnadia texana Pack. 
Fig. 45. The last smallest tooth on the cutting edge of the mandible, enlarged. 
Fie. 5. Apus lucasanus; 1st maxilla of larva 5™™ in length, with the maxillary lobes 
and the spinose portion. 
6. 2d maxilla of Fig.5, drawn to the same scale. 
Fie. 7. Apus lucasanus; ist leg of male larva when 5™™ in length. en!—en®, endites 1-6. 
ax!—aot, pseudo-joints of the axis of the limb; en!, the gnathobase. _ 
8. Apus lucasanus; End of abdomen of larva 3-5™™ long. 
Fig. 9. Apus lucasanus; End of abdomen of larva 1™™ in length. rec, rectum; m, 
sphincter muscles of anus; er, chitinous rod. 
Fic. 10. Apus lucasanus; Lower margin of shield of ¢ 5™™ in length; »lat, lateral line 
becoming gradually obliterated; ép, inner posterior line. 
Nee.—All the figures on this plate were drawn by C. F. Gissler, Ph. D. 
