576 



FAMILY IV. SCOLYTIDJE. 



899-a (- -). CALANDKA ORYX.*; ZEA-MAIS Mots., Et. Ent., IV, 1855, 77. 



Always larger and stouter than oryzcc. Beak longer, more suddenly 

 narrowed before the eyes. Thorax more densely punctate. Length 3.2 

 3.4 mm. 



Florida and Texas. (Casey.} Introduced from Cayenne, de- 

 veloping in New York in 1853, from grain sent on for exhibition. 



900 (11,217). CALANDRA RUGICOLLIS Casey, 1892, 687. 



Oval. Brownish-black, the elytra each clouded feebly with rufous 

 along the middle. Beak as long as thorax, feebly curved, coarsely punc- 

 tate near base. Thorax barely as long as wide, tubulate at apex, sculptured 

 as given in key. Elytra two fifths longer and at humeri as wide as thorax; 

 disc with contiguous rows of very coarse, quadrate, crowded punctures; 

 alternately separated by narrow, flat intervals. Length 4 mm. 



Southern Florida. Described from a single female. 



Family IV. SCOLYTIMJ. 

 THE BARK AND TIMBER BEETLES. 



This family includes beetles of diverse form, whose struc- 

 tures, with the names applied to them by Dr. A. D. Hopkins in 



the publications of the U. S. Gov- 

 ernment, are shown in Figures 132, 

 134 and 135. They are of unusual 

 interest from their unique habit of 

 excavating characteristic egg galleries 

 (Fig. 131) and of importance as destroy- 

 ers of forest trees.* While differing 

 among themselves in many respects they 

 are all small, more or less elongate 

 beetles, with compact, cylindrical bodies, 

 short legs, and dull coloration of va- 

 rious shades of brown, in which the an- 

 tennae (Figs. 13G, 137) are geniculate 

 with scape short, funicle 1- to 7-jointed, 

 club generally compact, (sublamellnte 

 only in Plilwoplitliorus} ; tarsi (Fig. 139) 

 5-jointed, first joint usually short, but 

 as long as the others united in Platypo- 

 fourth joint sometimes very small 





-O 



Fig. 131. Work of a Scoiytid 

 beetle, Scolytus rugulosus Ratz., 

 on twig under bark, a, a, main 

 galleries; b, b, side or larval 

 galleries; c, c, pupal cells 

 natural size. (After Ratzeburg.) 



(Fig. 133) ; head usually narrower than 

 thorax, but sometimes broader (Platy- 

 podinre) ; eyes usually oblong, some- 

 times divided (Xylotcrus), sometimes 



destroyed by 



*Their importance may be illustrated by this sentence: "If the timber 

 these insects in the United States during the past fifty years were living today, 

 stumpage value would be more than $1,000,000,000." (Bull. 83, U. S. Dept. Agr.) 



its 



