四川省阳蝇属三新种（双翅目：蝇科）

THREE NEW SPECIES OF GENUS HELINAFROM SICHUAN,CHINA(DIPTERA:MUSCIDAE)

阳蝇属（ＨｅｌｉｎａＲ．－Ｄ．，１８３０）三新种：双鬃阳蝇．新种Ｈｅｌｉｎａｄｉｐｌｉｃｉｓｅｔａｓｐ．ｎｏｖ．；大斑阳蝇，新种Ｈｅｌｉｎａｍａｇｎｉｍｕｃｕｌａｔａｓｐ．ｎｏｖ．；欢愉阳蝇，新种Ｈｅｌｉｉａｈｅｓｔａｓｐ．ｎｏｖ．。模式标本Ⅰ号存华西医科大学，Ⅱ、Ⅲ号存于雅安地区卫生防疫站。

Abstract Helina dupliciseta sp.nov,(fig1)Malc:Body length 8mm Eyes covered by sparesely short cilia. Frons narrower than distance between outer margin of posterior ocelli, interfrontalia as wide as front ocellus,ori 9 pairs,2 pairs reclinate setae reaching ocellar triangle, Parafacialia about 1/2 width of 3rd antennal segment Antennac dark, 3rd segment 3. 5 times as long as wide,arista plumose, longest hairs as wide as A3. Epistoma do not protrude,palpi black.Thorax is black in ground with densely grey dust, 4 vittac on the seutum ac 0 + 1,dc2 + 4, ia0 + 2 stpl1:2, pra longer than 2nd ntpl. No topleuron with hairs; basisternum,hypopleuron and beret all bare Stigmae fuscous, seutellum black ,which bare on ventral and lateral sides. Wing yellow and hyaline, costal spines weakly,radial node are bare on the upper and lower surfaces r_4+ 5 and m_1+2 are separated each other at apex,calyptrae brown and halterx red yellow Legs: fore femur black,fore tibia withoutp;mid femur black in basal and yellow in distal halves,a row of av in basal half and long pv in basal one third, mid tibia with 2P;hind femur yellow with a complete row of ad,av in distal half and pv in distal one-fourth hind tibia with 2 av and 2 ad Abdomen cone-like, black with densely pollen,a narrow vitta on 3rd to 5th tergites,posterior marginal bristles on 4th and 5th tergites and diseal brlstles on the latter ones. 2nd to 4th stemites have a pairs of long marginal bristles on each.FemaLe:Unknown Holotype,Huanglong canyon of Songpan County. 1991-07-27,coll. Deng An-xiao.The new species is related to Helinia in flata Fang,Li et Deng, 1986, but the latter with the legs wholly black;halteres black at knob;eyes densely covered with long hairs;arista short plumose,longest hairs one half as wide as 3rd antennal segment 2 Helina magnimuculata sp. nov.Feng(fig 2)Male: Body length 8-9mm Eyes bare. Frons as wide as ocellar triangle,interfrontalia lined ori 6-8 pairs and one pair of proclinate setae are in front of ocellar triangle Antenna:lst and segments are yellow fuseous,and 3rd dark about 4 times as long as wide;arista plumose, longest hairs twice as wide as 3rd antennal segment. Epistoma not protrude palpi black. Thorax is black with yellow grey pollen,a pair of brown stripe reaching before seutellum;ac 0 + 1, dc 2 +3, ia 0 + 1,pra weakly,stpl 1∶2 .Basisternite of prothorax bare Prostigma yellow and poststig ma fuscous. Seutellum black on dorsal and yellow on ventral and lateral side.yellow and hyaline,costal spines faint,radial node and r_4+ 5 vein in basal half having setulac Squamae and halters brown.Legs:fore femur black inbasal half,but indistal half and other segmente brown yellow;fore tibia without median p;mimur brown yellowexcept black in basal part,a row of ad in hasal half and 3.4 pv in basal one-third, and 1 a on subapical part,midtibia with 2 p;hind femur brownish with a complete row of av,av,in distal one-third and pv in basal half;hind tibia with 1 av and 1 ad. Abdomen cone-like in shape with grey yellow pollen. 3rd and 4th tergites with a pairs oflarge black spots on each side,a pair of small dots on 5th tergite near posterior margin. 2nd sternite with long anddense setae in basal two- thirds.Female: Body length 7-8mm froms well over a one-third(0. 35-0.37 head width; frontal triangle towardlunula;4 pairs ori and 2 pairs ors; inner and outer vertical bristles develop well;humeral callus dark yellow; scutel-lum black on dorsal and yellow on lateral and ventral sides lst and 2nd syntergite yellow partly,3rd and 4th tergiteshave a pair of black spots which is larger than male’s ones,there are 3 spermathecae in it. Holotype,paratypes 1.10, Jinfengshan of Yaan,1993-11-O2,coll,Feng Yan.New species is related to Helina confinis(Fallen,1825),but is distinguished from the latter by baving lst and2nd antennal segments brownish, post dc 3,arista long plumose; femura greater part brown yellow.3 helina hesta sp.nov.Feng(fig 3)Male:Body length 6-7mm Eyes covered by densely and long hairs. Frons is 1.5times as wide as front ocellus.Interfrontalia disappears at