110 NEW YORK STATE MUSEUM 



' Walker's (1856) description is as follows: 



Pachyleptus. Nearly allied to Ceratopogon. Body 

 slender ; head small, nearly round ; palpi moderately long ; anten- 

 nae mutilated; thorax convex; abdomen nearly cylindrical, some- 

 what contracted towards the base, much more slender than the 

 thorax, and almost twice its length ; posterior legs rather long 

 and slender; femora subclavate; fore legs raptorious; femora thick, 

 tibiae slightly curved, closely applied to the femora; wings nar- 

 row ; veins like those of Ceratopogon in structure. 



Ceratopogon sp. sens. lat. 



(P1.18, figs. 1-3) 



The larvae were found in Eddy pond, Ithaca N. Y., in April. 

 They are white with brown miarkings; length 8-9 mm. Head 

 brown; each eye consists of two nearly contagious spots; anten- 

 nae two-jointed and very short; setae on the head as shown in 

 figure 3. The labrum' (fig.l) is rounded, with a pair of jointed 

 and a pair of simple papillae. The mandible is shown in fig.Sm^ 

 the maxilla in fig.2ma?^ the latter has a prominent two-jointed 

 palpus, labium (fig.2?) rounded, with three cephalad projecting 

 teeth on the floor of the mouth cavity. The segments of the 

 thorax are marked with brown, the first with three blotches on 

 dorsal surface, the second with two lateral spots, and two longi- 

 tudinal lines which rise at the anterior margin and extend half 

 the length of the segment, the third with two nearly contiguous 

 spots on each side, and a pair of spots on its anterior margin.* 

 Each abdominal segment has a pair of elongate spots at the 

 anterior margin, a dorso-lateral and a ventro-lateral stripe, the 

 latter prolonged anteriorly and joined by a transverse fascia at 

 the incisure; a fine median central stripe is produced forward 

 from the transverse fascia. These stripes vary in length, in 

 some specimens forming almost continuous longitudinal stripes 

 along the abdomen. Setae of caudal end are about eight in 

 number, comparatively small, and arranged not in pairs but 

 singly. Pupa and imago not obtained. Of this species speci- 

 menis have been kept living in aquaria from October to April. 



Ceratopogon sp. sens. lat. 



Professor A. S. Packard (1870) published an account of a larva 

 and pupa which belongs to the group of the bare-winged 

 Ceratopogon. It is described as T a n y p u s sp. to which 

 genus it certainly does not belong. The larva and pupa were 

 found at Clear Lake, Lake county, California. The description 

 states that the caudal end is without bristles or hairs of any 



