124 Journal New York Entomological Society. [voi.iv. 
dorsal shield strongly chitinized and with a yellowish tinge. There are 
no legs, but each of the thoracic segments bears on its ventral surface a 
pair of setigerous tubercles which are doubtless locomotive in function. 
Abdomen increasing gradually in size from the first to the third segment, 
thence gradually decreasing to the fifth. The remaining segments (ap¬ 
parently three in number) are much smaller than the preceding and 
decrease more rapidly in size. The eighth segment is deeply and broadly 
longitudinally sulcate, each of the lateral ridges (one of which bounds 
this excavation on each side) bearing an elongate setigerous tubercle 
near the anterior and another near the posterior border. The whole 
ventral surface of the body is traversed by rather deeply impressed longi¬ 
tudinal lines, which, running crosswise of the segmental incisions, give 
a somewhat tuberculate appearance to this region. On the dorsal sur¬ 
face the plications are parallel to the segmental incisions. Length io mm. 
Pupa tolerably closely reproducing the form of the beetle, the head 
and beak sparsely set with short and sharp spines. The pronotum 
bears a pair on the median line near the base; on each side of and a 
little posterior to this middle pair lies another pair, and, still exterior, 
another. The anterior portion of the pronotum bears one spine on each 
side near the front margin, separated from each other by a space some¬ 
what less than the width of the head; behind and somewhat to the 
side of these spines are two others, one on each side. The meso- and 
meta notum each bear two rows of spines which converge posteriorly. 
The abdominal segments are armed with transverse rows. Length 12 
mm. 
Numerous pupte and adults with one larva were found near Browns¬ 
ville, Texas, infesting a dead yucca. They occur in the decaying por¬ 
tion immediately underlying the old bases of the leaves. The specific 
identity of the beetle is not settled, but it may turn out to be the same 
as one of the Mexican species. 
EXPLANATION OF PLATE IV. 
Fig. I. Megeleates sequoiarum Casey. 
Fig. 2. Meracantha contracta Beauv. % 
Fig. 3. Hymenorus obscurus Say. 
Fig. 4. Acamptus rigidus Lee. 
Fig. 5. Yuccaborus, sp. 
Fig. 6. Piece of wood from soft maple tree, showing burrow of Acajnptus (Ac.) 
springing from burrow of Tremex (Tr.). 
All details are marked alike, viz.—lbr.=labrum; Mt.=labium; Md.=Mandible ; 
Max.=Maxilla; ant.=antenna. 
