134 Annals of the Carnegie Museum. 



b. Southwestern Brazil. 



The following notes apply only to the Brazilian specimens. 



d\ Differs from the northern, typical oculata Hagen chiefly in its 

 smaller size (see below). Blue spots on the dorsum of the middle 

 prothoracic lobe sometimes absent. Blue antehumeral stripe two-fifths 

 to one-half as wide as the black mid-dorsal at mid-height. Black 

 humeral stripe very slightly wider at its two ends, occupying nearly 

 all of the mesepimeron, at mid-height i^ times to equally as wide as 

 the blue antehumeral, not forked 13 but enclosing a very small blue 

 spot at its upper end, or forked in the upper third or less as in 

 typical oculata, or in one example in the upper half, the humeral 

 branch of the fork being a mere line except at its upper end, both 

 branches reaching to the upper margin of the sclerite. A black stripe 

 on the whole length of the second lateral thoracic suture, or occasion- 

 ally obsolete, except at the upper end. The width of the dorsal blue 

 on the anterior part of abdominal segment 2 is \ to \ of that of the 

 segment ; the mid-dorsal blue tapering posteriorly on 3-6 reaches 

 from the base backward to three-fourths or four-fifths of the length 

 of 3, two-thirds to four-fifths of 4, one-third to two-thirds of 5, one- 

 tenth to one-half of 6. Stigma of the front wings surmounting more 

 than one (55 per cent.) or one (45 per cent.) cell, of the hind wings 

 surmounting one (60 per cent.) or more than one (40 per cent.) 

 cell. Antenodal cells on the front wing 4 (80 per cent.) or 3 (20 

 per cent.), on the hind wings 3 (95 per cent.) or 4 (5 per cent.). 

 Percentages based on 10 d\ 



Abdomen 27-29.5 mm.; hind wing 18-2 1.5 mm. 



9 . Of the females which have been labeled by the collector with 

 the same numbers as the males, or which appear to be conspecific, 

 none have more than the first six of the abdominal segments, some still 

 less. The mesostigmal laminae are very similar or identical with that 

 figured u for oculata $ and resemble less the corresponding figures for 

 A. difficilis 15 and A. adamsi §. In all the labrum is either bordered 

 and medially crossed with black, or is wholly black ; there is more or 

 less black on the nasus, and the black of the frons reaches down between 



13 In oculata from Mexico, etc., the humeral stripe is often forked in its upper third 

 or less, although I have spoken of it as ''not forked" in the " Biol. Centr.-Amer. 

 Neur.," p. 81. This is one of the cases referred to, antea, pp. 117-118, where I think 

 it desirable to enlarge the meaning of the word " forked " used in this connection. 



14 Biol. Centr.-Amer. Neur. tab. 4, fig. 11. 



i 5 Z. c. tab. 4, fig. 15. § L. c. tab. 10, fig. 5. 



