317 



are short, stout, and apparently three-jointed. The l»asal joint is very stout, nearly as 

 broad as long; the second joint is slender, about twice as long as broad; the third 

 joint is very short, and bears a single stout, curved hook. The rostrum is distinct, 

 one-jointed, and three filaments protrude. Each abdominal segment bears laterally 

 a large, complicated pore, from which protrudes a glassy filament, short in this stage, 

 but very long in the following. A smaller pore is situated just laterad of the base 

 of the antenna, and those on the anal and pre-anal segments are smaller than those 

 on the others. Antenme six-jointed. Joint 1 short, stout; joints 2 and 3 long, 

 subequal in length, and each five times as long as 1; joint 4 one-half as long as 2 

 or 3; joint 5 one-half as long as 4, sharply pointed at tip. Dorso-anal pore large, 

 distinct; protrusile organ conical in shape, supported by a tri-lobed chitinous 

 framework. Entire dorsal surface of body finely granulate, the ventral surface 

 granulate laterally to the large pores. Each ventral-abdominal segment bears a 

 transverse row of eight small secretory pores, each of which seems to be tri-cellular. 



Adult Larva (Fig. 40). — Closely resembles the preceding, except that it is much more 

 convex, and has very long glassy filaments and an abundant secretion of white wax. 

 Abdominal segments very distinct, arched antero-dorsally, with a median longi- 

 tudinal ridge. The skin of this larva splits transverso-dorsally along the hinder 

 edge of the thorax, and from the middle of this slit medially and longitudinally to 

 the cephalic end of the body. From this double slit the pupa presumablj' emerges. 



Adult Female (Fig. 39a). — Length, 2.1'"">; expanse, 4.1'"™. Color dull honey-yel- 

 low ; eyes darker; abdomen, when swollen with eggs, much lighter, and bordered with 

 abundant waxy secretions. Antenuie 6-jointed. Basal joint short, stout; joint 2 

 (scape) twice as long, equal to it in width ; flagellum rugoso-annulate ; joint 3 longest, 

 more than twice as long as 1 and 2 together, and equal in length to 4, 5, and 6 together. 

 In dried specimens it becomes especially constricted at two points. Joint 4 rather 

 more than half as long as 3 ; joint 5 less than half as long as 4 ; joint 6 equal in length 

 to 5. Joint 6 with a bristle at tip, the other joints with sparse, short bristles. Head 

 conical when seen from above, the rostrum plainly 2-jointed, but perhaps with a 

 basal joint; the apical joint acute, nearly as long a^'t'he pTeceding joint. Eyes 

 pyriform, large. Two ocelli, large and conspicuous. Wings large, sub-opaque, 

 median vein divided at two-thirds wing length. Costa of fore-wing finely crenulate 

 to tip, furnished with sparse bristles arising below edge of wing. Costa of hind 

 wing with 8 or 9 rather long bristles or hairs near base. Legs slender, moderately 

 long, hind tibia with an internal row of bristles, tai-si 2-jointed, two large tarsal 

 hooks, with a median basal hook-like appendage much smaller than the lateral 

 hooks. Abdomen with 6 plain tergites, but 5 visible urites. Sixth tergite bearing a 

 pronounced median curved papilla ; ovipositor acute. 



Adult Male (Fig. 39A,). — Resembles the female except in being more slender and 

 longer by virtue of the two large forficular claspers, nearly as long as the entire abdo- 

 men and which give the average specimen a total length of 2.8"^"", as against 2.1'"™ for 

 the female. Between the two claspers is a short curved style rather more than one- 

 third the length of the claspers. Sixth tergite bears a median papilla and the fourth 

 urite a similar one. Color of abdomen much darker than in female, particularly at 

 hind border of segments; claspers still darker. 



FURTHER NOTES ON THE COTTONTAIL BOT, WITH THE BREED- 

 ING AND IDENTIFICATION OF THE FLY. 



By C. H. Tyler Towxsend, Kingston, Jamaica. 



Ill a paper in Psyche for August, 1892, the writer j. iblisbed a descrip- 

 tion of this bot. In tlie present jiaper some supplementary notes are 

 presented on the larva of this species, followed by a description of the 

 23123— No. 5 3 



