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 lo 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 pupje 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 



Fig. I. Megeleates sequoiarum Casey. 

 Fig. 2. Meracantha contracta Beauv. 

 Fig. 3. Hymenorus obscurus Say. 

 Fig. 4. Acamptus rigidus Lcc. 

 Fig. 5. Yuccaborus, sp. 



Fig. 6. Piece of wood from soft maple tree, showing burrow oi Acamptus (Ac.) 

 springing from burrow of Tremex (Tr.). 

 All details are marked alike, viz. — Ibr.^labrum ; Mt.=labium; Md.=Mandible ; 

 Max.=Maxilla ; ant.=antenna. 



