TANYPUS. 197 



mentis 8. Pedes sat longi, pubescentes, inerraes. Mas. Antennae 

 plumosae ; articuli usque ad duodecimum globosi ; decimus tertius 

 longissimus ; decimus quartus brevis, subconicus. Fcem. Antennae 

 pilosae, subrnoniliformes ; articuli globosi ; decimus quartus crassior. 

 Body of moderate or small size, elongate, somewhat pubescent. Eyes 

 reniform, separate in both sexes. Mouth not elongated. Palpi four- 

 jointed, prominent, curved, nearly cylindrical ; first joint much shorter 

 than the second ; second shorter than the third ; fourth nearly as long 

 as the second and the third. Antennae fourteen-jointed, porrect, fili- 

 form, seated in a notch of the eyes. Thorax oval, convex, higher than 

 the head. Scutellum of moderate size. Metathorax semioval, slightly 

 gibbous, with a small longitudinal furrow. Wings narrow, elongate, 

 lanceolate, deflexed, generally pubescent, most often ciliated along the 

 hind border ; mediastinal vein ending at beyond half the length of 

 the wing ; subcostal ending at before two-thirds of the length ; radial 

 emerging from the praebrachial transverse veinlet, ending at beyond 

 three-fourths of the length ; cubital also proceeding from the praebra- 

 chial transverse veinlet, ending at very little in front of the tip ; sub- 

 apical ending at very little behind the tip ; subanal forming a fork of 

 the praebrachial ; anal complete ; subaxillary not reaching the border. 

 Areolets thirteen, the humeral, the subcostal, the mediastinal, the ra- 

 dial, the cubital, the praebrachial, the pobrachial, the subapical, two 

 externo-medial, the anal, the axillary, and the subaxillary ; the two 

 last partly united. Posterior margin much excavated, and forming a 

 slightly acute angle at its base. Abdomen with eight segments, much 

 longer than the thorax. Legs slender, moderately long, pubescent, 

 unarmed ; coxae of moderate size ; ungues and onychia very small. Fore 

 legs remote from the others, porrect, their tarsi somewhat elongated. 

 Male. Antennae plumose ; joints from the first to the twelfth globose, 

 very small; thirteenth extremely long; fourteenth short, nearly conical. 

 Abdomen longer, more slender and more hairy than that of the female, 

 with two small, curved, caudal appendages. Fore tarsi occasionally pi- 

 lose. Fern. Antennae pilose, submoniliform ; joints globose ; the four- 

 teenth rather thicker than the others, sublanceolate, pubescent, more 

 acuminated. Fore tarsi always bare. 



The Tanypi are generally similar to the Ckironomi in their ha- 

 bits. Most of the species have spotted wings ; some have white 

 and almost transparent bodies, and the delicate structure of T. 

 monilis is very remarkable. 



" The larva of T. maculatus resembles that of Corithus plumi- 

 cornis, but is less elongated, its head is more oval, the thorax has 

 at its base beneath a long pediform bifid tentacle, and the tip of 

 the abdomen is furnished with four minute triangular plates, which 

 have two long pediform appendages beneath and two above, the 

 latter more slender, and with long terminal hairs. It is found at 

 all seasons of the year, the depth of winter excepted, in stagnant 



