224 PROC. ENT. soc. WASH., VOL. 22, NO. 8, NOV., 1920 



shrill, rapidly repeated sound audible for several feet, by extend- 

 ing and withdrawing the tip of the abdomen. Owing to the 

 peculiar nature of the porous wood the normal moisture con- 

 ditions were difficult to maintain in caged sections and the adults 

 all died, but young larvae were observed boring in the wood 

 about a month after collection, and after two months a very few 

 nearly full-grown larvae were found in longitudinal tightly 

 packed galleries. Some months later a few adults emerged. 

 The adult gallery is usually a simple or branched hole bored at 

 right angles to the grain of the wood and 2 1 /2 to 3 mm. in diam- 

 eter. The larval gallery follows the grain of the wood and is 

 usually about three inches in length (Fig. 1 I. 



Eichhoff (1S6S Berl. Ent. Zeitschr. XII, p. 149) described 

 Hyle sinus (?) globosus from "America bor." A few months later 

 Chapuis (1869 Synop. Scolyt. p. 28. Author's separates appar- 

 ently published in advance of its republication in Mem. Soc. Roy. 

 Sci. Lyon, p. 23(5, 18(59) redescribed it as Dendrosinus globosus 

 Eich., also from North America, but including a form from 

 Columbia as a variety. In 1S92 Eichhoff wrote to Riley (see 

 Proc. U. S. Nat. Mus." XVIII, 489(5, p. 607) that he had received 

 his two types from Dr. G. Kraatz labeled North America, one 

 of which is now before me in the U. S. National Museum Collec- 

 tion. Reitter (1894 Bestim.-Tab., p. 45) described D. bonnairei 

 from a single immature and badly mutilated example (length 2 

 mm.) of unknown source, which he had received from Marseilles, 

 France. Blandford (1907 Biol. Centr.-Amer. Coleop. IV, pt. 6, 

 pp. 155-157) redescribed globosus from Venezuela (Moritz) from 

 material in the Vienna Museum and mentions having seen the 

 type in the Schaufuss collection (Dresden). He also describes 

 three new species from Mexico, Brazil and Columbia, and indi- 

 cates the Chapuis (1869) variety as probably mttijrons Blandford. 

 As Blandford's redescription of globosus differs in some characters 

 from those of Eichhoff (1868) and Chapuis (1869) as well as 

 from the Eichhoff type now before me, I believe it best to desig- 

 nate the latter as "holotype." It seems doubtful if Blandford's 

 Venezuela specimens are really conspecific with globosus. 



The adults here described are remarkable in our fauna by 

 their large size, black, opaque, subglobular form and are unique 

 in the sculpture and vestiture of the front (Fig. 2, B) which is 

 ornamented by two rows of stiff, appressed curls of black hair, 

 arising laterally, meeting at the middle and exposing two sub- 

 lateral round and two median triangular mirror spots. The 

 description follows: 



