212 ALBATROSS EXPLORATIONS, INSECTS — HOWARD. 



rior margin of first pale; bead and first dorsal plate greenish ; antennae 

 pale brown; legs very light yellow (pale), probably red in life. 



Rather slender, anterior segments attenuated. 



Venter slightly reticulated, .sulcus very indistinct ; clypeus not deeply 

 excised, foveolae 2+2, distant, sulcus shallow. 



Antennae slenderer than "in surinamensis, hardly reaching second 

 segment. 



Ocelli about 40, in a series, patch suboval. 



Segments shining, rather smooth, especially posteriorly ; anterior ten 

 segments with distinct concentric striae on basal part ; posterior part, 

 especially on anterior segments, sulcate beneath ; division of segments 

 not evident, a hollow depression along which are horseshoe like de- 

 pressions ; these are scattered over the dorsal part of segments, but are 

 small and shallow; the posterior four segments almost destitute of 

 markings. 



First segment narrowed laterally, anterior margin concave, a strong 

 marginal sulcus. 



Anal segment obtusely angled, not surpassing valves ; anal valves 

 narrowly margined, reticulated ; anal scale very slightly rounded, almost 

 transverse. 



Repugnatorial pore large, situated in hollow on anterior part. 



Legs extending slightly beyond sides of body. 



Segments 50. 



Length of body 45"""; width 3.4 1 "" 1 . This species is described from 

 an adult female; in the same vial is a very young specimen, showing 

 only 4L segments. In Karseh's " N'eue Juliden des Berliner Museum 1 '' 

 this species would stand near Spirobolus biconicus from Mauritius. 

 2. Himantarium teeniopse (Wood). 



No. 599, Margarita Island, Lower California; $ . 



A young specimen. Pairs of legs, 148. 



3. Pectiniunguis americanus gen. et sp. nov. 



Diagnosis. — Related to Schendyla eximia Meinert ; but the anal pair 

 of legs jointed and the claw of maxillary palpus pectinate along its 

 entire under side. 



Type.— No. 598. 



Hab.— Pichiliugue Bay, Gulf of California. 



Description. — Orange, darkest anteriorly; legs pale. 



Robust, scarcely attenuated anteriorly, more posteriorly. 



Segments not polished, very finely reticulate; sparsely pilose. 



Prehensorial legs not reaching base of antennae; sternum almost 

 twice as wide as long, anterior margin slightly callous ; coxa 1 ! of about 

 equal length and width, unarmed, anterior margin not much sinuate. 



Cephalic plate slightly longer than wide; basal plate three times as 

 wide as long; pre-basal plate exposed. Antennae filiform, rather loug. 



Dorsal plate manifestly bisulcate. 



Spiracles suboval, longitudinal, auterior largest. 



