MORGAN HEBARD 143 



ventral jiortions moderately well supplied with spines. Operculum produced, 

 free margin forming a median angle of less than ninety degrees with apex 

 rather l^luntl}' rounded. Femora with the two dorsal and the two ventral 

 margins armed, the dorsal armament the heavier, this armament represented 

 by spines proximad, developing rapidly into triangular spiniform plates, then 

 decreasing near the extremities to heavy spines. Tibiae with ventral surfaces 

 supplied proximo-mesad with a few small spines, supplied dorsal with an alter- 

 nating series of triangular, spiniform plates, which decrease greatly in size distad. 

 Tarsi with large pulvilli, occupying distal half of ventral surface of metatarsus 

 and all of this area in the three succeeding joints. Large arolia present. 



Lengthof body, 51.5; pronotum, 3.2; mesonotum, 10.4; metanotum, includ- 

 ing median segment, 6.8; cephalic femur, 11.9; caudal femur, 13 mm. Width of 

 mesonotum, cephalad, 2.9; mesonotum, caudad, 5.8; metanotum, 5.8 mm. 



General coloration bister and snuff brown, heavilj' marbled with microscopic 

 black markings which give the insect a soiled appearance. Many of the plates 

 on the limbs are almost solidly black. Many of the heavier spines are black 

 tipped. The proximal abdominal spiracles are narrowly margined dorsad 

 with greenish white. 



The type of this remarkable spine-covered walking-stick is 

 unique. 



Acanthoclonia carrikeri new species (Plate XX, figs. 4 and 5.) 



The present species is so distinctive in several features that 

 generic separation may eventually be found necessary. At pres- 

 ent, however, the forms of this group are known from so few 

 specimens and the differences between all the species of Acan- 

 thoclonia are so remarkable, that-we do not feel justified in taking 

 that step. Certain features, such as the spined occiput, general 

 disposition of a large number of the spines and absence of spined 

 lamellate processes on^ occiput and metanotum, agree best with 

 Mirophasma cirsium Redtenbacher, but the great development 

 of spinulose lobes on the abdomen, with other features, serves 

 readily to separate that species. 



The most striking features in the present species are: the 

 antennae with first joint unarmed and succeeding joints straight 

 and not enlarged distad; rather smooth dorsal surface between 

 the spines and spinulae, and caudal metatarsus nearly as long as 

 the combined length of the succeeding tarsal joints. 



Type- — cf ; La Palmeta, Santander, Colombia. Elevation, 7500 

 feet. July 15 to 20, 1916. (M. A. Carriker Jr.) [Hebard Col- 

 lection, Type No. 467.] 



TRANS. AM. ENT. SOC, XLV. 



