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Show 236 INSECTA. MAoROPEZA, Meig. d. · uished by t h e extraordinary hle nIfg thh o· f The Macropezre are Istlng little more than a t elr their poster.i or legs. .T heir antennce, to a length, are densely pilose( 1 ). DxxA, Meig. tly closely a 11•te d to the Trichocerre, b1u t The Dixce are apparen . hort the second is almost g o- tl e first 1·oint of the1. r an tenore IS very s rtio' nally more slen d er. Th e b l Jar and the follow.m g nes are propo . ( ) 0 u ' I . . also more e1 o nga ted than in Tr1chocera 2 • last joint of the pa pt IS b t ten or six joints. There the antennre have u. f ten form the genus • Those, 1. 0 w hich they CODSlSt 0 ' MEKISTOoERA, Wied. Where the wings are distant(S). ed of six form the Those in which they are compos HEXATOMA, Lat. . • merre and Nematocerre of Meigen, Which will comprise the .flmso b the third joint of the an-d ·.rr. f m the Hexatomce y . d'fli which only lUer ro d. in this respect 1t 1 ers tenore being there longer than the secon . but slightly from the others( 4). h eceding ones in the absence Other Tipularice, analogous toft l e -~r es exhibit a rare anomaly ded figure o t leu ey ' h of ocelli and the roun d t'tute of wings, and hence t e in this order of Insects: they .are es 1 ly to this subdivision. The .flptera wh1ch we app • t origin of the term ' h t o e slender towards the ex re-antennce are filiform, bu: somew T~e ~e;; are long, and the tibire un· mity, and but slightly pllose. l' l terminates in a point formed arme d · The abdomen of the .ema es b a bivalve ovipositor. y This subdivision comprises the genus ((21)) IMdeemig.. , Ibid., and Macq., D'l p t . du nord de la France. (3) Dipt. Exot., P· 41. I t lV 260; Meig., Ibid. (4) Lat., Gen. Crust. et nsec ., ' DIFTERA. 237 CuioNEA, Dalm. C. araneoides. The only species known; it is found in win· " ter, on snow and ice(l). A second subgenus mJght be formed with the Tipule atome of De Geer-Mem. Ins., VIII, 602, XLIV, 27-which is always apterous, but whose antennce have at least fifteen joints, whereas M. Dalman allows but ten to the preceding Insect. De Geer found this species running very rapidly across his table. They are both very small. Another division of our Tipularice, that of the Fungivora, is distinguished from the preceding ones by the presence of two or three ocelli. The antennce also are much longer than the head, slender, composed of fifteen or sixteen joints, a· circumstance. which removes these Insects from the succeeding division. The eyes are entire or emarg-inated. There is no division in the last joint of the palpi. The wings are always incumbent and horizontal on the body, and their nervures, longitudinal as well as transverse, are usually much less numerous than those of the preceding Tipularice. The legs are always long and slender, and the extremities of the tibice spinous. In some the palpi are curved, and composed of at least four very apparent joints. The an~ennre are filiform or setaceous. Of these, some have the anterior extremity of the head prolonged into a rostrum or proboscis, and in those where this elytron is less considerable, the head is almost entirely occupied by the eyes. There are always three ocelli. The antennce are short, and their joints but slightly elongated. Those species, in which the eyes occupy almost the whole of the head, where the ocelli are of equal size and placed on a common eminence, and where the rostrum projects and is not longer than the head, form the subgenus RHYPHus, Lat.(2) Those, in which the eyes only occupy the sides of the head, where the ocelli are not situated on a common tubercle, and where the an- (1) Dalm., Anal. Entom., p. 35. (2) Lat., Gen. Crust. et Insect., IV, 251; M'eig., Ibid. |