KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND. 22. N:0 7. 119 



T li e m a 1 e. 



The body is more compressed than in the female, the perseon is a little shorter, and 

 the pleon somewhat longer but still shorter than the perseon. The hirsute covering is 

 more dense on the forepart of the body, the pleon and the urus being only sparingly 

 set with hairs. 



The head is considerably more deep than long, and scarcely as long as broad. On 

 the upper side of the head there is a longitudinal depression, like the depression on the 

 side of a peach, dividing as it were the head into a right and a left portion. This de- 

 pression continues on the front side to the upper margin of the antennal groove, which 

 commences a little below the middle of the front side. The head is as long as the first, 

 second, and half the third peraeonal segments together. All around on the surface 

 of the head there are a covering of slender hairs, a twentieth of a millimeter long; they 

 are placed in the angles of the facets of the eyes; from this feature the generic name 

 has been chosen, 'Iovkcomg means literally »a woolly eye». 



The eyes occupy the whole surface of the head. The ocelli are larger than in Hy- 

 peroche and Hyperia, about two hundred in number in each half of the head. 



The first pair of antenna? (PI. VIII, fig. 2) are shorter than the second pair. The 

 first joint of the peduncle is very stout, a little more long than thick, smooth, more than 

 twice as long as the two following joints together. The second and third joints are equal 

 in length. The first joint of the flagellum is tumid, about as long as the whole peduncle, 

 feebly tapering towards the apex; the inner and under sides are richly covered with long, 

 slender, olfactory hairs, fixed on button-like disks. The second flagellar joint is very short, 

 the third is more than twice as long as the second, the fourth still longer, the following 

 ones are slowly increasing in length; the last one is about twelve times as long as broad. 

 In all the flagellar joints are thirteen in number. 



The second pair of antennae (PI. VIII, fig. 2) are fixed in the antennal groove just 

 at the limit between the front and under margins of the head. The first free joint of 

 the peduncle is a little shorter and narrower than the first peduncular joint of the first 

 pair, and scarcely longer than the two following joints together; the last peduncular joint is 

 somewhat shorter than the next preceding one. The flagellum consists of thirteen joints; 

 the first joint is the shortest but stoutest, it is more than twice as long as the last pe- 

 duncular joint. The following joints are narrowly cylindrical, increasing in length, the 

 last, or thirteenth, is about twenty times as long as broad. 



The labrum is small, irregularly bilobed, and richly covered with short, slender hairs. 



The mandibles (PI. VIII, fig. 5) are more elongated than in Hyperoelie, the stem 

 is straight, almost linear; the incisive lamina is strong, armed with eight sharp teeth, the 

 molar tubercle is very protuding, large, the grinding surface elongate-ovate, no hairs or 

 bristles are to be seen between the molar tubercle and the incisive lamina. The secon- 

 dary incisive lamina of the left mandible is small, armed with five teeth, it is placed in 

 almost right angle with the principal lamina. The palp is fixed near to the apex of the 



