PSYCHODIDAE T1PTJLIDAE. 



FAM. Y. PSYCHODIDAE. 



Charact. No ocelli. Body with, long, coarse hairs. Thorax without a 

 transverse suture. Tibiae without spurs. Wings everywhere with 

 long coarse hairs, many longitudinal veins, and only a few trans- 

 verse veins ; no discoidal cells. 



The genera of Psyclwdida, on account of their neuration, form 

 two sections ; in the first, the PSYCHODINA, there are, between 

 the furcate longitudinal veins common to all genera, two simple 

 longitudinal veins. The genera of this section are : PSYCHODA 

 Latr., PERICOMA Hal., ULOMYIA Hal. (= Saccopteryx Hal. ol.), 

 POSTHON Loew, and NYGMATODES Loew (= Nemapalpus Macq.). 

 In the second section, the PHLEBOTOMINA, we see only one longi- 

 tudinal vein between the two furcate veins. The genera belonging 

 here are: PHLEBOTOMUS Rond. (= Hoemasson Loew), TRICHO- 

 MYIA Hal. (= Phalcenomyia Loew), SYCORAX Hal., DIPLONEMA 

 Loew, and PHIUEMATUS Loew. 



The small number of N. A. Psychodidce I have seen, belong 

 without exception to the genera PSYCHODA and PERICOMA. In 

 Europe there have been discovered besides the genera Ulomyia, 

 Phlebotomus, Trichomyia, and Sycorax. From the smalluess and 

 fragility of Psychodidce, it may easily be conceived why so few 

 N. A. species have still been detected. 



FAM. VI. TIPULIDAE. 



Charact. No ocelli.* Thorax with a V-shaped transverse suture. Legs 

 very elongated ; the basal cells of the wings reaching beyond the 

 middle ; discal cell existing in most of the genera. 



The want of ocelli, the considerable length of the legs as well 

 as of the basal half of the wings (the latter cause producing a 

 prolongation of the basal cells beyond the middle of the wing), 

 are the most essential characters of this family. Moreover, the 

 Y-shaped transverse suture of the thorax is of the greatest value, 

 since only the anomalous genera DIXA Meig. and CHIONEA Dolman 

 are destitute of it. It does not seem natural to attribute to the 

 former genus, on account of this circumstance, any other place 



* Except in Trichocera, where they exist. 0. S. 



