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Show 258 INSECTA. body in every direction, advances and moves abo!lt in the sand, and excavates there an infundibuliform cavity, at the bottom of which it secretes itself either entirely or partially. If an Insect be precipitated into the trap it rises suddenly, clasps it with its body, pierces it with the stings or books of its head, and sucks it. It flings away the carcass as well as the sand, by bending its body, and then suddenly relaxing it, like a bow. The pupa is covered with a layer of sand. M. de Romand, paymaster-general at Tours, who makes a par-ticular study of the Insects in his vicinity, has again observed the metamorphoses of this Insect, and sent me several living larvre, some of which I preserved in that state for three years(l). The Clinocerre-CLINOOERA-of Meigen, by their wings, seem to belong to the following division. The other Tanystoma of our second division have their wings incumbent on the body, and exhibit at most but two complete or closed cells. The antennre terminate in a palette, almost always accompanied by a seta(2). The palpi of the greater number are flattened or la.miniform, and laid on the proboscis. These characters, a body com pressed on the sides, a trian· gular head, slightly projecting in the manner of a snout, the abdomen curved underne&th, and long slender legs furnished with little spines, particularly distinguish the genus DoLICHoPus, Lat. Fab. Which now forms a small tribe-DoLIOHOPODEs-arranged by M. Macquart, in a very natural order, which we adopt, with the excep· tion of one alteration, which will place Dolichopus proper and Or· tochile, with which he finishes, at the beginning. The male organs of generation, in some, present laminiform ap· pendages. ( 1) For the other species, see Fabricius, Meigen and Macquart. (2) In several, the last joint of the antenna: differs but little from that of the preceding Diptera, but the relative position of their wings and their reticulation present distinctive characters. DIPTEUA H • . 259 ere the prob osci. s I. s elongated, and fo . rms a httle rostrum. ORTOOHILE ' Lat• M e.i g. .M1: acq.( 1) There, as in all the other I Dolichopi th b . . or a most non-salient. ' e pro osc1s 1s very s 1t ort, DouoHoPus proper. . Where the third joint of the slightly elongated, with a seta f antennre is almost triangular but theTform of a joint between its ~i~~derate length, uninflated a~d in hese Insects are f: e and extremity 1 requently • ong and very slender Th green or cupreous. The legs Some of them run alo.ng theeysaurref founfd on walls, trunks of trees ~:e The 1 sexua organs of the I ace o the wa t er w·l th great cele'r i't • c 1 ma e are al Y• omp ex, and folded up under th most always external, large n u e venter. ' . • ngulatua, Fab .. Nemotll b XI ' 19 ' 2o . A nteunre b'u t half thc:e e l enr onzee ' D e G eer, Insect., VI, green, glossy; eyes golden· I gth of the head; body bronze- Its larva lives in th ' egs ~ale yellow; wings immaculate . h e ground· It . l • • ms ed with two points in th: (I Is ong, cylindrical, and fur-the front of the thorax of the n m orm of recurved hooks. On forwards, and bent into the fi y ph fare two long horns directed gure o an S(2). SYBISTROMA, Meig. Where the last joint of the a . blade of a knife, with a ver I ntennre .Is almost in the form of the to Tit s extremity(s). y ong seta, mflated like a knot ' ant er1. 0r he male organs of gene t' . fill·i~O rm appendages. ra 1011 m the ot h ers are furnished with Here, the third joint of the a n t ennre e.i ther borders on an oval or (1) Lat., Gen. Crust. etlnsect. IV 289 (2) For the remaining s ecie , ' . See also Meigen and Mac uart a Memoir of the Baron Cu~ier ~~ a~d s;me others of the following subiene;. •e ••; aloo Me;gen and Macqu.; e OU•n. d'Hist. Nat. et de Ph yo., II, P· ;53~ ( ) MeJg., and Macquart. |
