Vol. XXV] ENTOMOLOGICAL NEWS 345 



opinata, June 23, 6 males ; June 24, 2 males ; June 26, i male ; 

 June 27, I male; July 21, i male; July 27, i male; December 

 2, I male ; May 2, i male. Pellucida : June 23, i male ; June 24, 

 2 males ; June 26, i male ; June 27, i male ; July 22, i male ; 

 July 27, I male ; July 30, i male ; August 3, i male ; September 

 28, 2 males; October i, i male; December 2, r male; May i, i 

 male. This list gives the actualities, not the possibilities, of 

 capture ; on many occasions the insects were not molested as we 

 wished to observe their habits and behavior. This list does show 

 that both forms occur at the same times and, we may add, at 

 the same waterfalls. 



Among our exuviae of Thanmatoneura we have one from 

 which we saw inopinata male emerge, another from which pel- 

 lucida male emerged. A minute comparison of these two ex- 

 uviae has failed to furnish any differences other than those due 

 to injuries sustained by the larvae previous to transformation. 



A definitive answer to the question raised on page 344 as to 

 the relationships between the two male forms of Thauma- 

 toneura to each other and to the apparently single form of fe- 

 male, can only be obtained from breeding experiments. As 

 far as present evidence goes, I am inclined toward the dimor- 

 phic male hypothesis. If it prove to be true, Thanmatoneura 

 would furnish a case more or less parallel to those described by 

 Westwood (1839) for certain Staphylinidae, Leuthner (1885) 

 for Lucanidae, and Skinner (1913) for Lycaena pseudargioliis. 



Additional Descriptive Notes. 

 Some additional notes on our Juan Vinas material of Than- 

 matoneura are added. 



Description of the Colors of T. pellucida male, taken Dec. 2, 1909. 



Description made immediately after death. Eyes dark brown, almost 

 black. Each gena with a roimd yellow spot below the base of the 

 antenna ; f rons between the right and left yellow spots pale blue as 

 also is the nasus, but the fronto-nasal suture has a black line and black 

 encroaches on each side of the nasus from below. Thoracic sutures 

 and mid-dorsal carina lined with orange-yellow. A short occipital 

 line, four small spots on the front prothoracic lobe and a pair of mid- 

 dorsal spots on the middle prothoracic lobe are also orange-yellow. 



The rest of the body is black, covered with pruinosity on labium, 

 under and lateral surfaces of thorax, most of abdominal segment i, a 



