284 W. SAVILLE-KENT, CONTRIBUTIONS TO A 



with that of the Arrhenuri. The pattern of this areolation in 

 M. 7misc2ilus corresponds essentially with that of 21. cruenta. 

 Neuman neither in his diagnosis nor figures indicates the exist- 

 ence of any hairs or setose appendages attached to the body of 

 M. musculus beyond a single pair of setae projecting from the 

 postero-ventral region. As a matter of fact a similar pair is 

 found in connection with each of the ten or more couples 

 of stigmata-like gland-apertures developed at subequal distances 

 throughout the entire length of the median, dorsal and ventral 

 regions. The prominent genital plates again, represented in 

 Neuman's figures as entirely bare, are abundantly clothed with 

 hairs, a prominent uniserial fringe of larger ones defining the 

 periphery of the ventral border and numerous smaller ones being 

 developed upon its labial surfaces. 



A point of some interest has been observed in connection with 

 the structure of the posterior legs of Marica musculus. A 

 recognised diagnostic feature in this genus consists of the fact 

 that the distal joint of the appendage terminates, not in sym- 

 metrical claws as with the three antecedent limbs, but in an 

 attenuate style suggesting an affinity with Liinnesia, and two 

 or more shorter setae. jSfeuman in his figures of the species 

 represents two longer and one shorter setae in occupation of this 

 position. In the single example examined by the writer, while 

 one long style and two shorter setae form the termination to the 

 right posterior leg, the distal joint of the corresponding left leg is 

 provided with a double claw similar in all respects to those which 

 arm the terminations of the three preceding pairs of appendages. 

 Whether this asymmetrical armature of the posterior limbs in 

 the species is of common occurrence can be determined only by 

 the examination of a large number of examples. Unfortunately 

 a mutilation of the left posterior limb of the single specimen of 

 M. cruenta prevents the determination of a like abnormality in 

 that species. 



Genus 3. Lebertia Neuman. 



Body symmetrically ovate, cuticle smooth and soft Avith a few 

 short hairs ; epimera of all four pairs of legs coalescing with each 

 but the area of the right and left pairs delimited by a median 

 rectilinear suture ; the two posterior pairs of legs furnished with 



