88 ENTOMOLOGICAL SOCIETY 
Blatta asellm Thunb., Mem. 1'Acad. Imp. Sc. St. Petersb., 
x, 227 (1826). 
Blatta cinerea Thunb., id., p. 2 77= Blatta rufa DeGeer. 
Blatta: cylindrica Thunb., id., p. 279. 
Blatta gibba Thunb., id., p. 279. 
Blatta limbata Thunb., id., p. 278. 
Blatta papillosa Thunb., id., p. 275. 
Some of these species of Thunberg's may not be blattids, 
but B. cinerea certainly is, for he refers to DeGeer 's figure in 
the description. 
The following species, all referred to before 1800 and after 
1758, I do not find in the catalogue. Some of them may not 
be Blattidae. All the references have been verified except 
those preceded by an asterisk. 
Blatta alba Strom., Nye Saml. K. Danske Skrifter, ii, 66 
(1783)- 
*Blatta anelytra Schranck, Beytr. Naturg., 73 (1776). 
*Blatta daurica Beckm. Laxmann's Sibir. Briefe, 48 (1769). 
*Blatta keteroceros Licht., Cat. Rerum. Nat., iii, 95 (1796). 
(MS. name very probably.) 
*Blatta ingensl<icht., Cat. Rerum Nat., iii, 95 (1796). (MS. 
name very probably) . 
*Blatta longicornis Licht., Cat. Rerum Nat., iii, 95 (1796). 
(MS. name very probably.) 
Blatta longipalpi Fabr., Ent. Syst., Supp., 185 (1798)- 
Blatta palliata Fabr., Ent. Syst., Supp., 186 (1798). 
Blatta reticulata Fabr., Ent. Syst., Supp., 186 (1798). 
Blatta obliquata Daldorf, Skr. Nat. Selsk., ii (2), 164 (1793)- 
This according to the describer equals Blatta germanica Linn. 
Blatta ocellata Gmelin, Linn. Syst. Nat., xiii, i, 2047 (1789). 
Blatta punctulata Gmelin, id. 
Ocellata and punctulata have the reference "Mus. Sesk., p. 
47, Nos. 7 & 8. 
Blatta ruficollis Fabr., Mant. Ins., i, 226 (1787). 
* Blatta trans fuga Briinnich, in Pontoppidan's Kurzg. Nachr. 
Naturhist. Dannemark, 212 (1765). 
Mr. Burke exhibited specimens, drawings and different 
stages in the work of the various insects which cause the 
"black check" of the western hemlock (Tsuga heterophylla). 
The primary injury is made by a member of the family Scoly- 
tidae, the hemlock barkbeetle (Hylesinus sp.), while the real 
injury to the lumber is caused by a rat-tailed maggot, the 
