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NEW YORK STATE MUSEUM 



of the Afiierican Entamological Society, 12:269, and for which the 

 name was afterward proposed. Since I have merely applied a 

 name to one of Selys'si groups of speciesi, I regard Gr. d i 1 a t a - 

 tus ais the type of Gomphurus, fixed by Selys's usage. I have 

 received from Mr. R. Weith, of Elkhart Ind., a cast slilx^ Lnat can 

 belong to none ether than this huge species. I give a descrip- 

 tion herewith. 



Nymph. Length 38mm, abdomen 22mm, hind femur 7mm j 

 width of head 6.2mm, of abdomen 10mm. Body strongly de- 

 pressed, with wide abdomen; skin 

 granulate, but little hairy except on 

 the sides of the head, antennae and 

 tibiae ; antenna with its third segment 

 thrice as long as the two firsft seg- 

 ments together; labium rather small; 

 median lobe in front with a deep semi- 

 circular concavity, the sides of which 

 are thinly fringed with flattened hairs 

 or scales; lateral lobes strongly 

 hooked on the outer end, and with 

 about six low, irregular, obliquely 

 truncated teeth on the basal two 

 thirds of the concave inner margin; 

 burrowing hooks of the fore and mid- 

 dle tibiae very large, triangular, as 

 long as the greatest diameter of the 

 tibia; dorsal hooks of the abdominal 

 segments very rudimentary, on segments 7-9 only, becoming 

 better defined on these segments successively; lateral spines on 

 segments 6-9, strong, increasing in size posteriorly, those of the 

 ninth segment twice as long as the tenth segment; superior and 

 lateral appendages paler dorsally, the laterals one fourth 

 shorter than the superior. 



Gomphus spicatus 

 The nymph which I described as belonging to this species 

 in Bulletin 47, page 459 does not belong to it. To what it may 

 belong 1 am quite uncertain; perhaps, to G. furcifer; per- 

 haps to some as yet unknown species. The description of the 

 true G. spicatus nymph will be found in the Illinois State 

 Laboratory of Natural History bulletin, 1901, 6:76. 



Fig. 14 Labium of the nymph of 

 Gomphus dllatatus 



