210 bulletin: museum of comparative zoology. 



596. DiNEMATOCRICUS MIMETES, sp. nOV. 



Type.— M. C. Z. 4,934. Paratypes.— M. C. Z. 4,935. Solo- 

 mons: Auki (W. M. Mann). 



Very close to D. eurhabdus. It has the same color-pattern but the 

 fulvous stripes are obscure and sometimes almost wholly obliterated. 

 The fulvous band along lower part of side when present not extending 

 so far dorsad. The male is larger and more robust, more nearly 

 approaching the female in size. 



In the gonopods of the male the inner branch, while small, is a little 

 longer than in the species mentioned and curves strongly mesad away 

 from the outer branch. The latter differs in being nearly straight 

 instead of strongly curving. The tongue of the anterior median plate 

 is more of a narrowly elliptic form beyond the narrowed, elongate 

 basal part, not distally incurving on the sides and slenderly acuminate. 

 Anterior gonopods distally stouter. 



Somites more strongly sculptured, the prozonite in particular more 

 strongly marked with transverse furrows and striae, a furrow a little 

 in front of suture above especially deep and well marked though not 

 always complete. 



Number of segments forty-seven to forty-nine as against forty-one 

 to forty-three in the other species. 



Length of male, 48 mm.; width, 4 mm. 



597. DiNEMATOCRICUS PLENUS, sp. nOV. 



Type.— M. C. Z. 4,946. Paratypes.— M. C. Z. 4,947. Solo- 

 mons: Florida (W. M. Mann). 



The general color of the prozonites is greyish brown, while the metazonites 

 are a deeper, more reddish, brown. Legs ferruginous distally, more brownish 

 proximally. Edge of labrum and of colluni all around, black. 



Sulcus on head vague or absent for a short distance in frontal region, else- 

 where distinct and continuous. Foveolae of clypeus, 2 + 2. 



Second tergite extending well below coUum, flattened beneath. 



Segmental suture very distinctly impressed entirely across dorsum. Bend- 

 ing forward at level of pore to come in contact with it. A secondary suture 

 in front of the primary one, than which it is in general much finer, especially 

 in posterior region. Striae on metazonite beneath, these descending a little 

 from behind forward to suture; striae on prozonite much finer and weaker, 

 often scarcely detectable. Scobina very small but deeply impre.ssed, ceasing 

 at twenty fourth somite. 



