168 PROCEEDINGS OF THE ACADEMY OF [1888. 



inside of this organ were fastened in patches, great numbers of a 

 louse, which produced an induration, ulceration, and finally perfor- 

 ation of the membrane." 



The characters of Mencpon perale as drawn from his original 

 manuscript are as follow : Head wider than long, transverse reni- 

 form, pale brown with a darker patch and a crescentoid lilack spot 

 between the clypeus and temple, fringed in front with short hairs, 

 with a longer tuft at the posterior lateral lobe, and a roAv of eight 

 along the posterior concave border. Antennae concealed beneath the 

 head, with the terminal joint largest and oval. Maxillary palpi 

 cylindrical, reaching to the lateral border of the head, four-jointed. 

 Mandibles strong, deeply two-toothed, black. Eyes two, close 

 together on each side at the lateral border of the head. Prothorax 

 narrower than the head, rounded hexagonal in outline and produced 

 laterally in a strong conical point, pale brown above with a darker 

 baud crossing the middle and darker at the lateral borders, smooth. 

 Metathorax as wide as the head, bell-shaped in outline, with lateral 

 rounded angles ; crossed by a row of hairs. Limbs well produced ; 

 anterior femora short and robust ; the posterior two nearly twice as 

 long as the former and darker brown in color. Tibise with a spur 

 at the distal extremity. Tarsus with an ovate appendage at the 

 proximal extremity, and a single hair at the distal extremity. Un- 

 gues strong, black. Abdomen long elliptical, nearly twice the length 

 of the head and thorax and widest at the fourth segment. Ses:ments 

 of nearly equal length, the last one mammiliform, all with a wide 

 chestnut brown band, and a row of short hairs emanating from clear 

 circular bases. Last segment with an additional tuft of hairs on 

 •each side. 



Entire length 21 lines ; color translucent whitish and transversely 

 striped with chestnut brown. Smaller individuals paler in color 

 with narrower stripes of brown. 



In an individual 4"75 mm. long, the head was 0*75 long and 1 

 mm. broad ; the prothorax 0*55 long and 0'825 broad ; the meta- 

 thorax 0'625 long and 1 mm. broad ; the abdomen 2*875 long and 

 1"25 m. broad. 



Attached singly or in groups up to fifteen or more between the 

 folds of the lining membrane of the pouch of Pelicanus trachyrhyn- 

 chus. 



The President was authorized to execute on behalf of the Academy 

 an acceptance of a Deed of Trust, by which Mrs. Emma W. Hayden 

 conveys to the Society in trust the sum of $2500.00, to be known as 

 the Hayden Memorial Geological Fund, in commemoration of her 

 husband the late Prof Ferdinand V. Hayden M. D., LL.D. 



According to the terms of the deed, a bronze medal and the bal- 

 ance of the interest arising from the fund are to be awarded annually 

 for the best publication, exploration, discovery or research in the 



