NO. 2171. SYNOPSIS OF THE COCCINELLID LARVAE— BOV IN G. 633 



Other species of Scymnid larvae have been described with a bifurcate 

 mandibular apex; the retinaculum is always thin-waUed and has a 

 single-pointed tip. 



The Scymnini are difficult to define and place as a group. Based 

 on the few characters used in the present paper, a form as Crypto- 

 laemus, for instance, with its bifurcate mandibular apex should logi- 

 cally be included in the following group, the Coccinellini, but the gen- 

 eral habitus of the larva is very different from that of the CoccineUini 

 and agrees well with that typical for many Scymnini. It seems ad- 

 visable for the present to include all the genera mentioned as Scymnini 

 in this one group. 



Group IV (NOVIINI). 

 Plates 120 and 121, fig. 27. 



This group contains but the one genus Novius upon which Gangl- 

 bauer ^ has based his tribe the Noviini. 



The only species represented in the National Museum is Novius 

 cardinalis Mulsant. 



The dorsal outline of the body is ovoid with its maximum width at 

 the third abdominal segment. Prothorax is trapezoidal, about half 

 as broad as long, anteriorly and laterally broadly rounded; the ninth 

 abdominal segment is nearly semicircular, half as long as broad, 

 anteriorly somewhat narrower than the eighth abdominal segment, 

 posteriorly without any serration or crenation. The thoracic spira- 

 cles are placed in the protopleurite, and the shape of the pleural areas 

 is as in the foregoing group, but the Noviini differ from the Scymnini 

 by having a setiferous tubercle developed in the subtriangular ex- 

 tension from tergum. Prothorax has on each side of the middle line 

 two longitudinal chitinous patches; on mesothorax and metathorax 

 is a small setae-bearing tubercle on each scutal area, close to a large 

 chitinization in the alar area (see page 626). 



Small chitmizations with a few setae occur on each of the scutal 

 areas of the abdominal segments and still smaller chitinizations are 

 found on the abdommal spiracular areas. Well developed setae- 

 bearing tubercles are present on the pleural lobes of all segments. 

 The areas below the sternopleural suture exhibit no special structures. 

 The hypopharyngeal bridge is strong, the ulterior portion of the base 

 of the mandible is molar-shaped, the tip of the mandible single- 

 pointed; retinaculum is simple and thin-waUed. 



Group V (RHYZOBIINI). 

 Plates 120 and 121, figs. 32a, b, 

 The two following genera and species, included in this group, have 

 been examined: Rhyzohius ventralis Erichson (CaUfornia) and Lin- 

 dorus lopliantae Blaisdell (Cahfomia). 



» Die Kafer von Mitteleuropa, vol. 3, pt. 2, p. 977. 



