ART. 12. MASKELL GENERA OF COGCIDAE MORRISON. Ill 



probably representing very heavily chitinized ducts of the type 

 usually attached to the gland spines; marginal setae, dorsally, with 

 one tiny seta at the outer basal angle of each median lobe, one large 

 and stout one above the reduced second lobe, one large and stout 

 one just outside of the second marginal tubular duct, one large one 

 just outside the fourth marginal tubular duct, ventrally all large and 

 stout, one outside of second lobe, one just inside of third tubular 

 marginal duct, one, small, half-way between fourth and fifth tubular 

 ducts ; without incisions with thickened edges or chitinous paraphyses 

 as in some Aspidioti; anal opening medium, circular, a very little 

 nearer to base than to apex of pygidiiini; paragenitals numerous, 

 in five groups, linear, and often indistinctly segregated, median 5-6, 

 anterio-laterals 16-22, posterio-laterals 16-19 ; marginal tubular ducts 

 of two sizes, the normal ones large and very long, one outside of 

 first gland spine, one outside of second gland spine, then three at 

 intervals about equal to the space between the first two, then three 

 more at wider intervals; with much smaller tubular ducts, possibly 

 corresponding to those opening into the gland spines when these are 

 present, beginning opposite the fifth large duct, with four between the 

 fifth and ninth large duct; and 6-8 along the margin anterior to 

 the ninth large duct; with dorsal ducts, these nearly as large and 

 long as the marginal, few in number, two to three in first group, 

 opposite posterior end of posterio-lateral paragenital group, five to 

 six in the anterior group, opposite the anterior portion of the para- 

 genital arch; pygidium without basal thickenings but with broad 

 thickenings running in from the posterior margin dorsally, the me- 

 dian pair of these continuing to well beyond the anal ring, the two 

 laterals on each side nearly as far. 



Intermediate stage feviale. — Similar to the adult, apparently dif- 

 fering only in the smaller size, the somewhat reduced development 

 of the different glands, etc., and in the absence of paragenitals. 



Larva. — (Cast skin only.) Antennae 5-segmented, the terminal an- 

 nulate ; legs normal ; apex of abdomen with a pair of tiny diverging 

 median lobules, one pair of well developed lobes between which are 

 two tubular ducts, two pairs of ventral setae, one large (apical) and 

 wanting in specimens studied ; with a dorsal and ventral seta, then a 

 tubular duet, then a marginal lobe, then another dorsal seta, and a 

 ventral seta, a tubular duct, etc., outside of the median lobe ; with a 

 few scattered ventral surface setae. 



Cotype.—Q^t. No. 24780, U.S.N.M. 



The presentation of the generic diagnosis is deferred until the de- 

 scription of the following new species has been given, as both species 

 are covered in the genus description. 



