THE CANADIAN ENTOMOLOGIST. 151 



Female: Length of body 1 8 mill.; breadth 2 mill. Head nearly 

 circular, convex above, blackish fuscous, reddish in the centre, densely 

 covered with short reddish hairs ; eyes very small, below and a little be- 

 hind the antenna, scarcely visible from above, kidney-shaped; facets 

 less numerous, smaller and not convex, as in the males ; indeed the eyes 

 of the female are compound, flattened eyes, though those of the males are 

 nearly aggregated eyes ; clypeus short, transversal, somewhat reddish ; 

 rhinarium large pale membranaceous ; labrum large, rounded, light brown, 

 darker in middle ; maxillary palpi very pale brown, the two last joints 

 longer ; labial palpi same color, last joint longer ; head beneath, blackish, 

 fuscous reddish in the middle ; mentum transversal, quadrangular blackish 

 fuscous. Antennas (only 21 joints present) short, perhaps as long as the 

 head, blackish fuscous, hairy, articulations pale ; ist joint thicker than the 

 others, cylindrical, less than twice as long as broad ; 2nd as long as broad, 

 3rd very little longer, 4th to 6th very short, annular ; the seven following 

 alike, about globular, the rest longer, ovid. Prothorax about as broad as 

 the head, quadrangular, a transversal sulcus after the apical third, and a 

 smaller one on the base ; mesothorax about twice as long as broad, a 

 transversal sulcus near the base ; metathorax as long as broad, quadrang- 

 ular ; no traces of wings; the 10 dorsal segments of abdomen 

 alike, a little shorter than broad, except the last one, which is longer, 

 rounded on tip, obtuse, deflexed at the end. The first 6 ventral segments 

 alike, half as long as broad; 7th shorter, the apical margin widely emar- 

 ginated, the middle forming a small transverse-oval plate, behind which is 

 to be seen the large genital aperture in the articulation of the segments ; 

 8th segment a little longer; 9th split longitudinally in two lobes for the 

 anus. Thorax and abdomen shining black and remarkable for its thick 

 and firmly chitinized integument ; below a little paler, brownish, and as 

 commonly the nerves of the chorda ventralis can be recognized through 

 the integument. Appendages symmetrical, two-jointed, cylindrical, apical 

 joint a little longer and thinner ; blackish fuscous, pale on articulations, 

 femora and first joint of fore-tarsi strongly enlarged ; middle legs less 

 strong and smaller; the inflated ist joint of the tarsus of fore legs with 

 an external apical black spine, longer than the 2nd joint. 



Hab. Amballa, E. India, by Rev. C. C. Carleton, one specimen in 

 alcohol. There can scarcely be any doubt that it is the female of O. 

 Michaeli described by Mr. Wood-Mason. The difference of the situation 

 of the genital aperture at the base of 8th segment (he says the 9th) is only 



