PHILIP P. CALVERT 351 



superior por delante azul, en el resto negro;" however, his descrip- 

 tion of A. truncatum seems to indicate that he considered the nasus 

 (post-clypeiis) to be a part of the hi])rinn. 



I have also studied the question of the distinctness of coecum 

 Hagen and cardenium Hagen with these results: 



Twenty-one males from Cviba show a variation in the abdominal 

 appendages ranging from that seen in plate XXXV, figure 38 

 through 41 and 42 to 39. Five males from Jamaica have the 

 appendages as, or very nearly as, in figures 44 and 45. One male 

 from Hayti has the appendages as shown in figure 40. The 

 Jamaican specimens appear to correspond to the t3'pical coecum, 

 which was from the Island of St. Thomas. Mr. Nathan Banks, on 

 comparing the drawings from which these figures were made with 

 Hagen's types in the Museum of Comparative Zoology, at Cam- 

 bridge, writes me that ''coecum is your figure 40, the upper in- 

 terior view is very like your figure 40a with apical barely longer; 

 from the side the lower part is not hooked so much at tip; the 

 lower appendages are more slender than your figure. Cardenium 

 is close to your no. 42p or no. 38; seen from side the apical part is 

 convex above and concave below and almost pointed as in your 

 no. 38p, but this apical part is rather longer than your no. 38 and 

 below is scar eel J' swollen in middle, so if turned only a bit one sees 

 the tooth, and the lower basal part is shaped more like your no. 

 42p, the outer edge almost at right angles with the upper apical 

 part, not grading into it as your no. 38p; seen from above within 

 it is very close to your 38a, with apical part, as I said, a trifle 

 longer; the intermediate basal pieces scarcely show from above." 



The only constant differences which I have found between 

 seventeen females from Cuba and three females from Jamaica are 

 in the color pattern of the prothorax and of the mesostigmal 

 lamina. 



Summing up for both sexes, the case stands as follows: 

 Coecum (three males, three females from Jamaica only): d^. A small single 

 tooth on the inner (mesal) .surface of the superior appendages at about two- 

 thirds their length; the inferior branch of the same appendages, seen in profile 

 view, as long as wide and forming between itself and the superior branch a 

 sinus which extends distinctly eephalad. 



Stigma of the front wings tending to be broader and with a more obtuse an- 

 tero-external angle. 



Pale postocular spots wider, i. e., .45-. 49 nun., measured from cephalic to 

 caudal edge. 



TRANS. .\M. ENT. SOC, XLV. 

 2 



