Studies on TipuUdae. 181 



II. Antennae iinipectinate (Hemicteina) : 5)- griseipennis Loew, 

 1. c. ; 6) yedinata (Wied.) Loew, 1. c. ; 7) gracilis Westw. 

 Zool. Jouru. V, p. 450; Lond. a. Ed. Phil. Mag. 1835,. p. 281; 

 id. Trans. Eut. Soc. Lond. V, 181, p. 380; 8) simplex Walk. 

 Ins. Saund.p. 446 {Ptilogyna). 



Y. On the australian genera Leptotarsus Gu^riii 

 and Semnotes Westwood. 



Leptotarsus Guerin, Voy. de la Coqnille, Dipt. p. 286, Tab. 20, 

 f. 1 (1838) and Semnotes Westw. Trans. Ent. Soc. London 1876, 

 p. 501, Tab. 3,11, 2, are abnormal australian Tipulidae, distiu- 

 guished by their very short antennae, with an incomplete number of 

 joints (ten or less), the presence of a nasns and their peculiar colo- 

 ring , yellow and bjack. I translate the definition of Leptotarsus 

 (from a mannscript copy, as I do not have the work before me): 



„According to the table of genera in the new work of^Mr. 

 Macquart (in the Suites ä Buifon) the present genus must be referred 

 to the division EE, coutaining species with a short and stout rostrum. 

 Our insect differs from Pachyrrhina, the only genus in this division, 

 by the structure of the last Joint of the palpi and the number of 

 joints of the antennae. 



„Rostrum stout and short (fig. lA); front but little protru- 

 ding; three first joints of the palpi (fig. IC) cylindrical and equal, 

 the last as long as the two preceding ones taken together, subdivided 

 in five very distinct joints, of which the first is the narrowest, and 

 the last longer than the preceding; antennae (fig. 'IB) filiform, 

 10-jointed; the first is large, cj- liudrical ; the three following stout, 

 short, equal in length; the fourth and fifth narrower and' obconical; 

 the four last much narrower, equal in length, elongate. Wings di- 

 varicate; five posterior cells; the second petiolate. Legs very 

 slender; tarsi at least twice the length of the tibiae" ; (follows the 

 description of Leptotarsus Macquartii). — 



The figure shows that the antennae are but a little louger than 

 the head; that the rostrum has a distinct nasus; that the venation 

 is that of a Tipida. I find in my notes that the figure represents 

 a female; but no mention is made in the letterpress of the sex of 

 the described specimen, nor of the structure of the forceps or the 

 ovipositor. 



Semnotes Westwood (1. c.) is represented by S. imperatoria 

 and ducalis, both from Australia. The antennae here are still 

 shorter than in Leptotarsus, shorter than the head, and they count 



