NO. 2171. SYNOPSIS OF THE COCCINELLID LARVAE— BOY IN G. 635 



the triangular shape typical of the majority of the Coccinellid larvae. 

 In most of the genera sclerites are developed in prothorax, and, when 

 present, the sclerites of scutum and the marginal area of tergum are 

 fused together; they are flat, covered with setae or developed into 

 setiferous spines. On mesothorax and metathorax a rather small 

 flat or spinose scutal sclerite is more or less confluent with a large, flat 

 or spinose sclerite in the alar area just below the parascutum. The 

 triangular pleural lobe, the hypopleural area and the eusternum have 

 only small chitinizations. The abdominal segments have a setiferous 

 flat or tubercle-shaped or spinose sclerite on the scutal area, another 

 similar one on the spiracular area and a third on the pleural lobe; the 

 surface of the hypopleural area, the parasternum and the eusternal 

 area is normally only sHghtly chitinous. The hypopharyngeal bridge is 

 strong, the inner portion of the basis of the mandible is molar-shaped, 

 the apex of the mandible is bifurcate; in Synonycha grandis, however, 

 the tip of each of the principal teeth is divided into two teeth, a large 

 distal and a smaller proximal one. The retinaculum is developed as a 

 straight, single, strongly chitinous tooth. 



Group VII (PSYLLOBORINI), 



Plates 120 and 121, fig. 30. 



The tribe Psyllolorini has been established by T. L. Casey on the 

 genera Psyllobora, Thea, Ealyzia, and Neohalyzia. The tribe is repre- 

 sented in the United States National Museum by larvae of the follow- 

 ing species: Pstjllohora parvinotata Casey (Cuba, Florida), Psyllobora 

 vigintimaculata Say (N. Amer.), and Thea 22-'punctata Linnaeus 

 (Denmark) . 



In the general shape of the body and its parts, in the development 

 of the mesothoracic and metathoracic spiracle-bearing protopleurite 

 into a triangular extension from the tergum, in the character, pres- 

 ence and distribution of sclerites or setiferous tubercles this group is 

 closely connected with the less speciaUzed genera of the Coccinellini. 

 The body is soft-skinned ; on each side of the tergum of prothorax one 

 {Psyllohora) or two (Thea) setae-bearing sclerites; setae-bearing 

 tubercles are found in mesothorax and metathorax in the scutmn, the 

 alar area and the pleural lobe ; setae-bearing tubercles are also found 

 in the same areas on the abdominal segments. The ventral areas be- 

 low the sternopleural suture have small tubercles on the hypopleural 

 parasternal and eusternal areas. The hypopharyngeal bridge and 

 interior base of the mandible as in the Coccinellini, but the rest of the 

 mandible differs from that of all the other Coccinellini in having the 

 apex produced into five teeth and the thin-walled retinaculum into 

 five teeth (Psyllobora) or several small rounded elevations (Thea). 



