PHILIP P. CALVERT 341 



quoted. From my studies of the Contribucion, I think that the 

 following notes may be usefully included here. 



Gundlach appears to have had no precise idea as to the total 

 number of abdominal segments in the Odonata. Thus, nine is 

 the number implied in his descriptions of Dythemis didyma, p. 

 269, D. aequalis, p. 270, D. debilis, p. 272, and possibly Mesothemis 

 mithra, p. 276, and Diplax ochracea, p. 277. Ten segments are 

 recognized in his translations from Hagen and for Pantala flaves- 

 cens, p. 245, and Mesothemis simplicicollis, p. 275. Eleven seg- 

 ments are mentioned for Lestes scalaris, p. 216, and twelve for 

 Lestes tenuatus, p. 214, Agrion {Enallagma) triincatum, p. 226, and 

 the female of Dythemis frontalis, p. 267. In many cases he refers 

 to the last three segments, or as antepenultimate, penultimate, 

 and last segments, from which some clue is often to be obtained 

 as to the number which he recognized in a particular species. 

 Comments on these numbers will be found under various species, 

 posted. Where his numeration differs from that commonly 

 recognized (10 + 1 anal segment), the increase is sometimes to be 

 accounted for by his reckoning segment 2 to be two segments 

 separated by the transverse median carina of that segment, e. g. 

 Dythemis didyma, p. 269, although in the following species 

 (D. dicrota) he does not seem to count segment 2 as if it were 

 two segments. 



Gundlach used "frente" to mean "clypeus," in some cases at 

 least, as is well shown in his description of Dythemis frontalis, 

 p. 267. 



In most species, the data given by Gundlach on the dimensions 

 and on the wings are translated from Hagen's descriptions in the 

 Synopsis of the Neuroptera of North America of 1861, even where 

 the description otherwise is original with Gundlach, although the 

 wings of Dythemis frontalis are exceptions. The descriptions of 

 new species lack measurements and data on the wings. 



In many ]1assages, Gundlach applies "pardo" (which two 

 Spanish-English dictionaries render "grey") to parts which are 

 luteous or pale brown in dried specimens. In the German ver- 

 sions in the Stettiner Zeitung, "pardo" is replaced by "braun." 



Since the Spanish descriptions of Pantala flavescens and hyme- 

 naea in the Contribucion correspond exactly to the German ver- 

 sions for these same species, one is tempted to conclude that 



TR.\NS. AM. ENT. SOC, XLV. 



