LAEVAL HABLTS OF THE TIGER BEETLES. 171 



stage of C. repanda only in having bristle Y (see fig. 29). The third stage 

 (fig. 48) possesses a number of bristles on each side of the median line 

 of the prothorax. 



The first stage of C. lepida (fig. 49) is like that of C. repanda except for 

 the bristles on the anterior side of. the head which may be weak or absent. 

 The second and third stages (figs. 50 and 51) possess many bristles that have 

 not been noted in any of the preceding species and races. These fall into 

 longitudinal and cross lines of more or less definiteness which will be 

 discussed in a succeeding paragraph. 



The first larval stage of C. cuprascens (fig. 55) is like that of C. lepida 

 (fig. 52), but the second stage is more like that of the last stage of C. tran- 

 queharica (fig. 45). 



In addition to the species herein treated, these characters have been 

 examined in the larval stages of Tetracha Carolina, Linn., larvae evidently 

 belonging to African and Australian Megacephalidce, in the British Museum, 

 and of the following species kindly sent to me by Dr. Walter Horn, of 

 Berhn : — C. campestris, Linn., C. hybrida, Linn., C. maritima, Dej. (?), and 

 C. hiramosa, Fabr. (Ceylon). The larger and more constant bristles of the 

 American species of Cicindela are present in all these. Tetracha Carolina^ 

 Linn., has a pattern strictly comparable to that of C. purpurea, 12-guttata, 

 etc. The pattern of some of the European species is identical with that of 

 purpurea. The study of the distribution of these bristles is difiicult and their 

 development and relation to other morphological structures have not been 

 studied. Any interpretation of their arrangement must accordingly be purely 

 tentative and for convenience in further study. 



The bristles fall with greater or less precision into several transverse and 

 longitudinal rows. There are four pairs of longitudinal rows on the 

 prothorax (A, B, C, and D of fig. 57) and two on the head (E and F of 

 fig. 58). The principal transverse rows are 1, 2, 3, 4, 5, and 6 on the 

 prothorax and 7, 8, 9, and 10 on the head. The positions of the principal 

 bristles are indicated by the point of crossing of the lines. The positions of 

 the more constant bristles are starred. 



At the present time it is impossible to make a key as so few larvae are 

 known and, in the case of the described ones, no figures or descriptions of the 

 arrangement of bristles have been presented. Accordingly, the distinguishing 

 characters of the different stages and species are presented in the Tables 

 below. For the arrangement of the bristles the reader is referred to the 

 figures just described. 



No generally practicable way of distinguishing the pupae has been founds 

 Excepting an occasional rudiment of some of the large and constant ones„ 

 the bristles are lost in the pupae. 



