394 CALIFORNIA ACADEMY OF SCIENCES. [Proc. 3D Ser 



i ? Tepic, Nov., 1894, Eisen and Vaslit. 



On examining the types of M. imitans Karsch in the 

 Konigliche Museum fur Naturkunde, Berlin, I found that 

 they differed from the individuals I described as imitans in 

 the following respects: — 



1. The superior appendages of the male have on their under surface a trian- 

 gular tooth which is denticulated on its basal side (as in M. inequiunguis Cal- 

 vert). Dr. Karsch's description 1 of imitans says of these appendages, "am 

 Unterrande geziihnelt," an expression which, it seems, may equally well 

 mean "provided with a tooth," as in the case of imitans types, or "pro- 

 vided with denticles," as in the individuals I referred to imitans. As, how- 

 ever, the type of Macroihemis (celczno Selys) and most of the species of this 

 genus have an inferior row of denticles, not a large tooth, one would be 

 justified in accepting the interpretation "provided with denticles" in the 

 absence of express statement to the contrary. 



2. The hamule of the male is more slender in imitans types. 



3. The antehumeral spots in imitans type are shorter (1 mm. long), 

 reaching from in front of the antealar sinus only one-third of the distance to 

 the anterior mesothoracic margin; longer (2.5 mm.) in the Baja Californian 

 species, reaching almost to the anterior mesothoracic margin. 



4. Sides of the thorax with three green spots in imitans types, due to the 

 absence of the fourth of the other species, or upper of the two on the 

 metepimeron. 



5. The difference in the coloring of the wings mentioned, 1. c, p. 533, 

 which is perhaps of slight importance, as the individual variation in this 

 respect is quite considerable in Macroihemis. 



It therefore became necessary to rename my imitans 

 and I proposed pseudimitans instead. 



30. Macrothemis inequiunguis Calvert. 



Macrothemis inequiunguis Calvert, Proc. Cal. Acad. Sci., 2d Ser., Vol. 

 IV, 1893-94, p. 533, PI. XVI, figs. 34, 40-45; Proc. Bost. Soc. Nat. Hist., 

 Vol. XXVIII, 1S9S, pp. 317, 319, PI. I, fig. 2. 



The males differ from the types in having both lips black, the brown stripes 

 on the lateral thoracic sutures much broader, front wings with thirteen ante- 

 nodals, nine postnodals, and by larger size — abdomen 27 mm., hind wing 

 31 mm. 



The females are like the types, but have thirteen antenodals on the front 

 wings. 



2$ 2 ? Tepic, Nov., 1894, Eisen and Vaslit. 



1 Berl. Ent. Zeit. Bd. XXXIII, p. 367. 



