158 ENTOMOLOGICAL NEWS. [April, 'l6 



A new Phalangid from the Coronados Islands (Arach.). 

 By T. D. A. COCKERELL, Boulder, Colorado. 



Last August my wife and I visited the South Island of the 

 Coronados group, off the coast of Lower California, Mexico. 

 Among the interesting arthropods collected was a Phalangid 

 of the family Trogulidse, which proves to be an undescribed 

 member of the genus Ortholasma Banks (Psyche, 1894, p. n.) 

 It may prove to be peculiar to the islands. 



The table given by Banks (Pomona Coll. Jn. Entom., 1911, 

 p. 417) may be enlarged and modified to admit the new species 

 as follows: 



Process of eye-tubercle relatively long and narrow, with six or more 

 transverse ribs on each side ; femora and tibiae not banded, 



rugosa Banks. 



Process of eye-tubercle relatively broad, spoon-shaped I 



i. Femora and tibiae banded; apical projections of process of eye- 

 tubercle beyond rim longer than broad pictipcs Banks. 



Femora and tibiae not banded ; apical projections of process of eye- 

 tubercle beyond rim much broader than long, 



coronadcnsis n. sp. 



Ortholasma coronadensis n. sp. 



Length of body 3.5 mm., 4 mm. if process of eye-tubercle is in- 

 cluded. Process dull white, constructed as in pictipcs, with the same 

 number of ribs, but even broader, the outline not far from circular 

 (excluding the narrower base), and the projections beyond the rim 

 very broad and short, with sloping sides ; anterior spine-like processes 

 of cephalothorax as in pictipcs. 



Legs sepia-brown, without bands. Body sepia-brown, the dorsal 

 surface with numerous white tubercles, the principal ones in two 

 longitudinal rows of six each ; these tubercles are connected with 

 transverse somewhat darkened ridges in the cephalothoracic region, 

 and on abdomen are situated on a lattice-work pattern of dark ridges, 

 forming a net-like structure with square meshes, the corners directed 

 laterad, caudad and cephalad: the margin of the body posteriorly is 

 furnished with a row of pallid blunt processes, connected by dusky 

 transverse bars, like a fence; the body beneath, ' including the coxae, 

 is densely beset with pallid round tubercles ; palpi bristly, last joint 

 short ; legs minutely hairy, trochanters strongly tuberculate. 



Type in the author's collection. 



Found in a cave-like hollow under a large rock, a consider- 

 able distance above sea-level. 



