Francesco Vitali, 2004d - Xylotrechus smei (Castelnau & Gory, 1841), its presence in Palaearctic region and description of the pupa (Coleoptera, Cerambycidae) - Doriana VII (340): 1--7 ISSN 0417-9927

The pupa of Xylotrechus smei (Laporte de Castelnau & Gory, 1841) is described, illustrated for the first time and compared with other West-European Xylotrechus-species.

The presence in Palaearctic of such widespread Oriental cerambycid is proved with biological, geographical and morphological characters.

(in English with Italian summary)


The species was misidentified by some Italian authors as the Himalayan Xylotrechus stebbingi Gahan, 1906 . Nevertheless, Xylotrechus smei can be easily distinguished .
According to the authors who really knew both species, they can be separated as it follows:

Xylotrechus smei
Description (Gahan, 1906) - Pronotum marked with 2 rounded dark brown spots on the disc and a smaller one on each side; disc raised and subasperate along the middle, here more or less infuscate, especially toward the base.
Elytra marked with 1 transverse band at the base; 1 short transverse spot behind; 1 narrow band that begins near the scutellum, passes close to the suture, diverges posteriorly and curves outwards before the middle; 1 transverse post-median band ; 1 large apical band, produced forwards at the suture.
Hosts (Duffy, 1968) - 50 tropical and Palaearctic broadleaf trees, among them Quercus, Ficus, Gelsus, Vitis, Ailanthus.
Distribution (Duffy, 1968) - W-Pakistan , India (Assam, Bhar, Madras, Maharashtra, Orissa, Punjab, Uttar Pradesh, W-Bengal), Bhutan, Myanmar. Imported in Africa (Tanganyihka, Zanzibar).
Now introduced in Mediterranean and North America .

Xylotrechus stebbingi
Description (Gahan, 1906) - Pronotum with 4 small brown spots in a transverse row across the middle; disc with a median asperate carina, which is broader and more strongly raised behind than in front.
Elytra marked with some small spots which form 3 interrupted bands; apex very narrowly marked with ashy-grey.
Hosts (Duffy, 1968) - Monophagous on Quercus fluribunda Lindl ex Camus (= Q. dilatata Lindl. ex A. DC). Records for Q. lanata Sm. in Rees (= Q. incana Roxb. n. n.) are due to misidentification (Stebbing, 1914)
Distribution (Duffy, 1968) - Himalayas

The drawings provided by Stebbing (1914 - Indian forest insects of economic importance - Eyre & Spottiswoode Ltd., London) are provided below:


Xylotrechus smei (Laporte de Castelnau & Gory, 1841) Xylotrechus stebbingi Gahan, 1906