1 AMILY HOSTRYCHIDAE 



153 



Trees Attacked. — Khair {Acacia- catechu): Raipur, Central Provinces 

 (F. Gleadow) ; Tcnninalia toinentosa : Seoni, Central Provinces (Hanson 

 and Stebbin^) ; Sal {Shorea robusta) : Dehra Dun (Littlewoodand Stebbing) ; 

 Kandrahi, Mandla (inihi) ; Anogeissus latifolia : Horai, Kumaun (uiihi) ; Sissu 

 (Dalbergia sissoo) : Changa Manga Plantation (Coventry and Stebbing) ; Dehra 

 Dun, and Goalpara, Assam (iiiiJii) ; Fhulahi (Acacia modesta) : Changa Manga 

 {inihi) ; Pterocarptis marsupiiun : Kisli, Banjar Valley, 

 Mandla (7;«7u") ; HB.rra. (Teruiinalia chebula) : Kandrahi, 

 Mandla. (niihi) ; Albizzia proccra : Ataran River, Tenas- 

 serini (iiiihi) ; Prosopis spicigcra : Sukkur, Sind, 



Beetle.— Elongate, oblong, stout, slightly dilated posteriorly, 



very dark brown, almost black, rather shining ; antennae and 

 legs reddish-brown. Head vertical, hidden 

 Description. beneath prothorax, punctate, with promi- 



nent light-coloured eyes. Prothorax very 



convex, rounded in front, incurved behind ; the anterior portion is 



coarsely and densely tuberculate and rasp-like, strongest on margin 



and decreasing in size towards centre of disk ; three prominent 



teeth on each side on the anterior margin ; posterior half rugose. 



Elytra parallel, convex, striate-punctate, the apex truncate and 



depressed, the striae most prominent apically, where they project 



in two elongate median sutural teeth, with two short stout teeth 



laterallv on each side ; declivity rugose-punctate. Length, 7 mm. to 



Fk;. ioi. 



Sino.vylon craxsmn, 



Lesne. x 4. India 



(except Madras), Burma, 



Since I first described a part of the life history of 

 this insect in Departmental Notes 



Life History. in igo2, a great de d of additional information has been 



collected on the subject. My first study of its habits 

 v^as made in the Changa Manga Plantation, where the insect infests the 

 sissu (Dalbergia sissoo) to a serious extent, in company with Sinoxylon 

 anale. Mr. ,B. O. Coventry had reported in 1899 that bostrychid beetles 

 attacked sissu billets in the Changa Manga Plantation ; but the identity 

 of the insects remained unknown until April 1901. 



The appearance on the wing of the first generation of the beetles of the 

 year varies in different parts of the country. In the north of India the 

 beetles commence egg-laying in wood in April. They are also to be found 

 thus engaged during this month in the Central Provinces, though it is not 

 unlikely that these beetles may be those of the second generation. I took a 

 generation of the beetles just maturing towards the end of May in Goal- 

 para, Assam, these being probably the second generation of the year. At 

 Pyimnaseik, on the Ataran River in Tenasserim, I found a generation 

 maturing and leaving the wood on 19 March, probably the beetles of the 

 first generation of the year issuing to lay the eggs of a second generation. 



The eggs are laid by the beetles in the wood of a variety of trees, and 

 are most usually laid in felled timber which has not become too dry. Occa- 

 sionally, when plentiful, they will tunnel into sickly or dying standing green 



