510 



Although it has not been observed in Indo-China it may exist there, 

 especially as it occurs in neighbouring countries and no measures have 

 been taken to prevent its introduction. 



KiEFFER (J. J.)- Sur divers Hym^nopt^res destructeurs des C^ramby- 

 cides nuisibles au Caf^ier et au Bambou. — Bull. Agric. Inst. 

 Set., Saigon, iii, no. 5, Mav 1921, pp. 129-140. [Received 29th 

 August 1921.] 



This paper deals with the Hymenopterous parasites of Xylotrechus 

 quadripes, Chevr. (coffee borer) and Chlorophorus annularis, Fairm. 

 (bamboo borer) that are being utilised to combat these Cerambycids 

 in Tonkin [see next paper]. 



A key is given to the new Braconids : Duportia cincticornis, gen. et 

 sp. n., from C. annularis ; Promiscolus sesquistriatus, gen. et sp. n., 

 from X. quadripes and C. amiularis ; Pristoloryctes striativentris, gen. 

 et sp. n., from A', quadripes ; and Doryctes trisiriaius, sp. n., D.strioliger, 

 sp. n., D. picticeps, sp. n., D. bistriatus, sp. n., and D. hrevipeiiolus, 

 sp. n., all of which parasitise both Cerambycids. 



Descriptions are also given of an Ichneumonid, Paraglypia iuhigera, 

 gen. et sp. n., from X. quadripes ; an Evaniid, Prisiaulacus nigripes, 

 Kieff., var. duporti n., from X. quadripes ; and the Bethylids, Sclero- 

 dernius domesticus, I.atr. (an ectoparasite of the larvae of both Cer- 

 ambycids, which also destroys the larvae and adults of the Braconids 

 named above) and Mysepyris grandiceps, sp. n., from X. quadripes. 



DupoRT (L). Rapports sur les Recherches poursuivies k la Station 

 Entomologique de Cho-Ganh. — Supplements to Bull. 130 & 131, 

 Cluimbre d' Agric. Tonldn & Nord- Annam, Hanoi, nos. 11 & 12, 

 September-December 1920, January-March 1921, 8 pp. & 5 pp. 

 [Received 2nd August 1921.] 



Recent work in connection with the parasites of the larvae of 

 Xylotrechus quadripes, Chevr., is reviewed. Doryctes strioliger is 

 apparently the most important Braconid parasitising this coffee borer ; 

 others are D. picticeps, Kieff., which was fairly abundant in 1919, and 

 D. tristriatus, Kieff., which although widely distributed is of very little 

 importance. The Braconids, Promiscolus sesquistriatus, Kieff., and 

 Pristodoryctes striativentris, Kieff., have also been reared on infested 

 coffee i)lants. The Evaniid, Prisiaulacus nigripes var. duporti, Kieff., 

 apparently increases naturally on coffee plants in certain districts, 

 and in greater abundance than the Braconids. 



The Bethylids recorded are Sclcrodermus domesticus, Kieff., and 

 Mysepyris grandiceps, Kieff. An Ichneumonid, Paraglypia tubigera, 

 Kieff., was taken from the trunks of coffee plants, and a species, 

 which appears to be identical with P. tubigera, has been reared from 

 Chlorophorus annularis. The parasites of C. annularis on dry bamboo 

 are the above-mentioned Braconids as well as Duportia cincticornis, 

 Kieff., and a Bethylid. Later observations show that a Braconid, 

 Doryctes sp., that breeds under natural conditions on the lar\'ae of 

 another beetle, Trachelobrachys elegans, FaiiTn., living under the 

 bark of the dead wood of Aleurites cordata, apparently also attacks 

 X. quadripes, though further investigations are necessary to confirm this. 



Cutting down and burning the diseased stems early in March is 

 advocated. By this means the emergence of numerous insects is 

 prevented. 



