116 TRANSACTIONS, NATURAL HISTORY SOCIETY OF GLASGOW. 



The head and prothorax are orange, the latter 

 margined with black posteriorly ; legs and claws 

 yellowish, the legs having dark streaks on the 

 coxae; rest of body whitish. Head elongate, rounded 

 anteriorly, the antennae very minute and, when 

 viewed with a high power, apparently biramous. 

 Prothorax almost quadrate, slightly contracted pos- 

 teriorly. The other segments increase in breadth 

 gradually to about the middle of the abdomen, and 

 then fall off* in size to the posterior end ; the meso- 

 and m eta- thorax being, however, longer than an}- of 

 the abdominal segments ; anal limbs long and slender, 

 terminating in a much-curved claw. From the anal 

 cavity proceed filaments which have no doubt a 

 respiratory function ; they are retractile, and in 

 an alcoholic specimen before me are exserted in 

 stellate form. The legs are short, and not markedly 

 different in length amongst the pairs. The whole 

 larva is sparsely covered with hairs. 



When the labrum is fully exserted, it is seen to 

 be broadened out, and to terminate in two large 

 fleshy transverse lobes having a close regular 

 fringe on their margins and a row of cilia on 

 their under side. Many larvae possess soft parts 

 under the plate of the labrum - bearing fringes ; 

 but in Wormaldia there does not appear to be 

 a hard plate at all, or, at least, if there is, it 

 is concolorous with the soft white parts, which is 

 unusual. The lobes can be withdrawn out of 

 sight into the cavity of the mouth in such a way 

 that I believe the fringed margins then face each 

 other. The mandibles are large, falcate, ending in a 

 large tooth ; they have also one or two smaller 

 teeth, and a row of indistinct denticulations. First 

 maxillae with lacinia ending in several spines and 

 with a strong fringe internally ; palpi four jointed, 

 first almost transverse, second about twice as long, 

 third longer still and more slender, fourth very 

 slender and terminating in two or three minute 

 processes ; the other parts modified to form the 



