164 bulletin: museum of comparative zoology. 



Number of segments, thirty-nine to forty-two as against fifty to 

 fifty-five in E. kaorinus. 

 Width (female), to 2.2 mm. 



443. EUMASTIGONUS DISTINCTIOR, sp. nOV. 



Type.— M. C. Z. 4,872. Paratype.— M. C. Z. 4,873. New 

 Zealand: Day's Bay, near Wellington (W. M. Wheeler). 



Very similar in coloration to E. kaorinus but the light markings more 

 pronounced; a row of light spots along the lower part of each side. 



Readily distinguished from the two other species in the character 

 of the male gonopods. The anterior median plate is narrower than 

 in either of the other species and at the distal end is straight or scarcely 

 crenately notched, not deeply angularly excavated. The coxal piece 

 of the anterior gonopods lacks the pectinae on the outer distal lobe 

 as does E. fasciatus; but this ectal process is much longer, exceeding 

 the inner process, distally rounded. The inner distal process differs 

 in being curved strongly ectad, the tip slenderly acute and bending 

 back mesad. 



Anal valves more obviously margined; two short submarginal setae 

 on each one. 



Number of segments, forty-one to forty-nyie. 



Width (female), to 2.4 mm. 



444. Eumastigonus parvus, sp. nov. 



Type.— M. C. Z. 4,874. Paratype.— M. C. Z. 4,875. New 

 Zealand: Day's Bay, near Wellington (W. M. Wheeler). 



Darker than the three preceding species and lacking distinct annu- 

 lations of lighter color, the prozonites each in the caudal part of its 

 overlapped portion with a narrow fulvous stripe across dorsum and a 

 similar one down each side showing through the colorless overlapping 

 zone of the preceding metazonite. Along each side of the body at the 

 level of the pores a series of large light ferruginous spots and lower 

 down toward the legs a series of smaller spots that fade out near middle 

 of length. Collum, excepting marginally, vertex and lower part of 

 head light ferruginous weakly darkened with a network of fine, largely 

 obscure, dark lines. Anal scutum black, its basal border on each 

 side and commonly the preceding metazonite light; anal valves either 

 du.sky ferruginous or nearly solid black. 



