1982年早春,城固县文川公社文光大队的小麦死苗严重,经观察系一种牙甲幼虫为害所致。采回幼虫经饲养得到成虫,标本寄请中山大学生物系蒲蛰龙教授鉴定,学名为Helophor-us auriculatus Sharp。牙甲科成虫和幼虫多为水生、杂食性,危害农作物的种类很少。据蔡邦华氏记载,英国产Helophorus rufipes Bosc危害芜青根叶,为本科中为害农作物唯一已知种。1955年湖北省曾报道小麦受一种牙甲Helophorus sp,幼虫危害甚剧,当时未鉴定出种名。陕西省五十年代初也有牙甲为害小麦之说,但无文字记载。鉴于国内外对麦牙甲生物学尚无研究,故将观察结果报道如下。 The early spring of 1982, Chenggu County Wenchuan commune Wenguang brigade died of severe seedlings of wheat, the observation of a dental larvae caused by damage. Reclaiming the larvae to obtain adults by feeding, specimens sent to the Department of Biology, Zhongshan University, Professor Pu Zhendong identified, scientific name Helophor-us auriculatus Sharp. Aneurysm adults and larvae are mostly aquatic, omnivorous, endangering the types of crops rarely. According to Cai Bang Fahrenheit records, the British production Helophorus rufipes Bosc endanger the turnip, the only known species undergraduate harmful crops. In 1955, Hubei Province reported that wheat was affected by a Helophorus sp. The larvae were very harmful and were not identified at that time. In the early 1950s in Shaanxi Province, there was also a tooth-damaged wheat, but there were no written records. In view of the lack of research on the biology of Malpighian at home and abroad, the results will be reported as follows.