318 INSECTA. 



M. Robineau Desvoidy, in his " Essai sur la tribu des Cuculidcs," 

 has added three others. 



The species in which the palpi (labial, according to his theory) 

 are shorter than the proboscis, and where the intermediate tibiae and 

 tarsi arc dilated and densely ciliated are designated collectively by 

 the generic appellation of Sabkthes*. Those in which the pro- 

 boscis is elongated and recurved at the end, and where the palpi, also 

 short, have the first joint thickest, the other shortest, and the three 

 others cylindrical, form the genus Megarhinus |. According to the 

 same author, the Cuiex ciliatus of Fabricius should form another, 

 his PsoROPHORA |. The ocelli are very distinct, and the legs of the 

 female are ciliated ; but the principal character consists in the pre- 

 sence of two little appendages situated on the prothorax, one on 

 each side. They appeared to us to be formed by the dilatation of 

 the lateral extremities of the segment. M. Desvoidy, in relation to 

 this subject, quotes a similar observation made on a species of Psy- 

 choda by M. Leon Dulbur, communicated to him by me. But he is 

 mistaken in saying that it had never been published — we noticed it 

 in the first edition of this work, in the article Bhtpiptera, and in that 

 of Psychoda. 



In the other Nemocera, the proboscis is either very short and ter- 

 minated by two large lips, or in the form of a siphon or rostrum, 

 but directed perpendicularly or curved on the pectus. The palpi are 

 bent -underneath, or turned uj), but in that case, from one to two 

 joints only. 



Linnaeus comprised them in his genus 



TaPLLA. — TlPULARI.E, Lcit., 

 Which we will divide in the following manner : 



We form a first section with those species iu which the antennas 

 are evidently longer than the head, at least in the males, sler.der, 

 filiform or setaceous, and composed of more than twelve joints in the 

 greater nimiber, and where the legs are long and slender. 



Of these, some always furnished with wings, never present ocelli. 

 The palpi pre always short. The head i.'? not (or but very slightly) 

 prolonged anteriorly. The wings are laid flat, or tcctiform, and have 

 generally but few nervures that are longitudinal, divergent, and free 

 posteriorly. The eyes are lunate, and the tibiae without spines. 



This subdivision consists of small species, which, while larvse and 

 nymphs, inhabit the water, or vegetable galls. 



Sometimes the anteniite are entirely covered with hairs, longest in 

 the males, and forming a triangular tuft. 



Most of their larvae live in the water, and arc allied to those of 

 the Culices. Some have false feet. Others, besides, have appeii- 



* M^m. de la Soc. d'Hist. Nat. de Par., HI, 411. 

 t Ibid., 412. 

 1 Ibid., 412. 



