154 ENTOMOLOGICAL NEWS [April, 'll 



EXPLANATION OF THE PLATES. 

 PLATE IV. 



Fig. i. The head and prothorax of Neurobasis chinensis?, from above. 



Fig. 2. End of labium of same, from within. 



Fig- 3- Lateral lobe of the same, from within. 



Fig. 4. End of abdomen, with caudal lamellae, from the side. 



Fig. 5. Head and prothorax of Calopteryx angustipennisf, from above. 



Fig. 6. End of labium of same, from within. 



Fig. 7. Lateral lobe of same, from within. 



Fig. 8. End of abdomen with caudal lamellae, from the side. 



PLATE V. 



Fig. i.. The nymph of Anisopleura comes?, middle gill wanting. The 

 outer ramus of the mandible is exposed at the side of the 

 mouth. 



Fig. 2. Lateral lobe of labium of the same. 



Fig. 3. Head and prothorax of Bayadera indicaf, from above. 



Fig. 4. Lateral caudal gill of the same. 



Fig. 5. Mandible of same: a, external ramus; b, internal ramus; c, 

 articulate tooth of the inner face. 



Fig. 6. End of labium of same, from within. 



Fig. 7. Lateral lobe of same from within. 



Fig. 8. Head and thorax of nymph from Jamaica, from above. 



Fig. 9. Mandible of same, from above, a, b, c, as in fig. 5. 



Fig. 10. End of labium of same, from within. 



Fig. ii. Lateral lobe of same, from within. 



Fig. 12. An unknown nymph from Jamaica. 



The Stridulations of Some Eastern and Southern 



Crickets * (Orth.). 



BY H. A. ALLARD, U. S. Dept. Agric., Washington, D. C. 



In all parts of our country musical species of crickets are 

 more or less common. Although the notes of locusts and 

 katydids are strident lispings and raspings, the Stridulations 

 of nearly all crickets are characterized by true musical tones. 

 These insects have become adapted to a wide range of en- 



*The crickets mentioned in this paper have been identified through 

 the kindness of Mr. A. N. Caudell of the U. S. National Museum, 

 and all material collected has been added to the U. S. Museum collec- 

 tions in his charge. 



