74 ENTOMOLOGICAL NEWS. [Feb., '13 



Otostigmus amballae sp. nov. 



Dorsum brown, olive along middle part of caudal border and in a 

 number of interrupted or broken longitudinal lines or streaks. Head 

 and first dorsal plate somewhat paler than dorsum. Legs testaceous 

 or yellowish; the posterior pairs distinctly ringed with bands of green. 



Head shining; showing numerous fine punctae with fewer coarse 

 ones intermixed. 



Antennae composed of 17 articles of which the first two are prac- 

 tically glabrous and the third one similarly so at proximal end. 



Dorsal plates from the third to the penult inclusive, longitudinally 

 bisulcate, the sulci deep and completely crossing the plates. Plates 

 from about the fifth caudad distinctly margined. All plates excepting 

 the first two and the last one with a low median keel, one each side of 

 this geminated by the sulcus, and two between the sulcus and the 

 lateral margin, these more lateral keels being more or less broken and 

 bearing inconspicuous tubercles along edges ; keels most distinct on 

 the caudal segments. First and second plates smooth. All plates punc- 

 tate. Last plate simply bowed out caudad, the mesal portion of mar- 

 gin rounded, not angular ; with a median longitudinal keel extending 

 from the anterior margin caudad a little more than half the length, 

 this keel being followed on the caudal portion of the plate by a 

 conspicuous median furrow; lateral portions of plate smooth or near- 

 ly so. 



Prosternal teeth 4 + 4; of these the most ectal is much the smallest 

 and the second from mesal line much the largest, the other two being of 

 intermediate size; line of apices of teeth strongly convex; all teeth 

 angular. 



Ventral plates from the second to the penult inclusive, deeply 

 longitudinally bisulcate ; also with a wider and shallower median 

 longitudinal furrow which is deepest in front of middle. Plates finely 

 punctate and those of caudal half of body tuberculate; the tubercula- 

 tion becoming more and more conspicuous caudad. 



Last ventral plate narrowed caudad, with the sides convex and the 

 caudad margin weakly concave. On caudal half with a distinct median 

 longitudinal furrow which continues cephalad as a pair of finer and 

 less distinct furrows. 



Processes of coxopleurae rather long, extending caudad of ventral 

 plate about two-thirds the length of the latter; terminating in four 

 spines or points, and also with a fifth spine on coxopleural margin 

 near caudoectal corner. 



At least the first three pairs of legs with two tarsal spines, the 

 others, or all but a few succeeding these, to the twentieth inclusive, 

 with one tarsal spine. 



